Hello Andy. I want to thank you to make a such video with great explanation! I have driving this car since 2009 and faced with this issue several years ago. Servicemans in our country told me that the sensor is not repairable and sensor is expensive in our country. But after watching your video I can understand that everything is possible if you really want to do it. Big thanks from Azerbaijan!!❤
Thank you. This is why i like these cars, most of the components are possible to disassemble and fix using simple tools and basic mechanical knowledge.
This video helped me like no other video and I have worked on many things. AndyP you are the man! Also love the "Digital" jacket you started the video in... I worked for that company when I was in College in the 80's PDP 11's and VAX 780's and of course all the peripherals. Again thanks 1998 C280 sport, 2015 E350
gracias de nuevo excelente aprendi mucho hoy como los otros dias, saludos desde paraguay (thanks again excellent I learned a lot today like the other days, greetings from paraguay)
Hi Im Shake from Malaysia..Im just having my 2nd W202 couple month ago. Earlier C180 since 2006 now C220 4 speed W202..Some restoration could be needed for my 1995 W202..Find very useful video from you tq.
Hey, great vid, question, was there fuel leaking from the sending unit as soon as I unscrew that Hex screw where you drain from the check valve, reason I'm asking is because I think I have a bad check valve, my fuel pressure is not up to spec, I've changed out fuel pump, fuel filter, all cracked hoses I saw, schrader valve, and purchased some refurbished fuel injectors for $30 each (all six injectors), car runs but idles rough intermediately
I was thinking may be soaking/spraying the parts that have oxidation with a very mild acid solution like CLR or The Works Tile cleaner rather than sanding. The solution will get into areas the sand paper cannot reach.
You mean the hose inside the tank? It pumps fuel from one side to the side that pulls fuel to the fuel pump. Thete's a ventury pump that this hose is connected to
@@AndyPMercedesBenzChannel Thanks Andy, it wasnt the pump that was the problem, as far as I can see..Car still has a mystery misfire but its much less after timing chain change, and all obvious tweaks.
Thank you for the video. I didn't have a jack or floor jacks that was able to lift my car high enough to fit a 5-gallon jerry can. I also noticed my existing wire connector is round while the sending unit connector on the new one is rectangular....did you have that problem? Did you splice or run a new wiring harness completely?
Oh yeah....I also read online that Mercedes had a recall on their original sending units because of the contacts corroded easily causing a poor electrical connection. Their newer sending unit contacts are supposedly gold-plated to better resist corrosion....how can we tell if the new sending units are the right ones?
One more question...sorry...while you were down there performing sending unit repairs, did you or have every replaced your fuel tank screen? I bought a new one and will replace since I am doing the sending units....
...this one is a very helpful video!👍👍👍 However, question.. if we just need to drain out the fuel tank, can we just loose off those two bolt (using a hex tool), slide in the hose and carefully pushing the hose up to move up the valve (the white valve). Will the fuel come out via the hose? thank u. awaiting your answer soon. Mine is w202 c200.
You could do it much easier without the hose and fitting. Remove the plug and push in a big screwdriver, it will push the ball in the check valve up and will let the fuel out. It might get messy cause youll get fuel everywhere. Using the hose makes it much cleaner
@@AndyPMercedesBenzChannel ..great! thank you. will do it using the hose. Anyway, what is going to happen if after both part of the tank was empty (LH and RH), i fill the fuel into the tank (around 20litres; probably will only fill up the RH part) ? will the engine able to start and well running (with the LH part empty) ?
@@geochannel8593 this is what ive done, ive drained both sides of the tank, replaced seals on both sending units and then put about 10 litre of fuel into the tank. Fired the engine and like i said... No problems. If you watch the video carefully i explained how the fuel gets from RH side to LH side.
Hello Andy. Awesome video. I'm about to take on this repair job myself. I have a few questions and I'm really hoping there's a way I can reach out to you for a little assistance. Thank you in advance
Hi Andy. I have the fuel leak on the right hand side also when I pump fuel it leaks onto the ground. What part of the tank is leaking in your experience? Would it be from the sender unit, or from the anti splash tank part?
@@AndyPMercedesBenzChannel okay thanks alot. I will give it a go. However my fuel gauge isn't working either so will have to do this fix on the video. Cheers your videos are awesome.
The ring that holds my sending unit is stuck and the tank twists so bad I am afraid it will crack 😭I have a spare one, but I am too lazy to swap the whole thing. And on the spare one, I also cant remove the ring! WTH is with my luck?! Oh and to top it all off, the metal half of the small crooked hose coming from the sending unit is rust as hell and I am afraid it will break. I have no idea how to find it (if it exist as a part) or how to swap it with a hose, considering its crooked like that...
Hello Andy. Brilliant video. I've been trying to drain the fuel tank via the method you described. However, pushing the valve on either sending unit with reasonable force (and a screwdriver) releases only a small dribble of fuel. Disconnecting the hose on the left sending unit released no fuel at all. The car (1993 W202 c180) has been sitting on my front porch for nearly 7 years. It has not been started since then. I am quite sure it was left with a quarter to half a tank of petrol inside. The petrol will most certainly be completely rancid by now, as such I am trying to remove it. I added around 10 litres of fresh petrol recently when I first tried to start the car again (this was before I discovered old petrol was still inside). However, I am still unable to drain this or any petrol. Could I be doing something wrong? Maybe I am not using enough force with the valve? Regards, R.K.W
Hi. The check valve doesn't need a lot of force. There's a much easier way to drain the tank: disconnect the fuel hose after the pump. Pull our fuel relay and jump the contacts. But I'm afraid the fuel has turned into jelly and will cause more damage.
@@AndyPMercedesBenzChannel Hi, thanks for the quick reply. I will assume that the fuel gel should be removed before adding fresh fuel. Is there an easier way to do this without removing the whole tank?
Great video, thanks! Quick question: My 1998 W202 (C230) had really bad gas (dark brown and nasty smelling), so I drained it out of the drain plugs just like you did except I used a Hold fluid extractor. It emptied quick. Then I put 2 gallons in it and ran it for about 15 minutes. Then shut it off. After about 30 minutes I tried starting it and it wouldn't start. So I did some tests and discovered that the fuel isn't leaving the gas tank and feeding the fuel pump. I watched another YT video showing a later model W211 and they show that the plastic hoses crack and break. But they access them from under the seat, and it's way easier than mine. But I don't know if that's causing it or what tests to do to make sure it's bad hoses. Do you have any ideas why that's happening and how to fix it?
first see if the fuel pump is still working, when you turn the ignition on you should hear the pump running. then check if the fuel actually gets to the pump
@@AndyPMercedesBenzChannel Thanks for your quick reply. I had to replace the pump b/c the existing one was totally plugged and corroded (I cut it open). So I checked the supply and return lines and they're clear from front to back. I determined that there is no gas coming out of the tank to feed the fuel pump. So I unscrewed the discharge nut and found it clear, and no debris in the feed-well. So that screen isn't plugged either. At this point I'm beginning to believe something is broken inside the tank. Any ideas what else can be causing no gas to get into the feed-well inside the tank? I read somewhere that the return line flows through a venturi which siphons gas causing it to flow between the tanks and fill that feed-well. If that's true, then how do you go about priming that return line if no fuel is in that feed well to be pumped through it? I don't know enough about this system to know how to troubleshoot it any further. Appreciate any help you can give.
@@AndyPMercedesBenzChannel Turned out to be the bellows type elbow on the feed well was disintegrated. Need new tank. OH BOY! Mercedes SHYT strikes again! Now I'm remembering why my main ride is a Honda Accord.
@@AndyPMercedesBenzChannel Thanks. A new MB tank is about $1k, so that's not an option. I'm going to cut up the tank and install a removable port designed for fuel tanks. Hopefully that'll do it. That way I can fix it any time I want in the future. I also need to fix the RH side level sensor, b/c the plastic hose disintegrated at the bottom and the o-ring seal for the sensor blew out. I'm almost done with that. Just need to find submersible gas line that won't break the bank.
Если сломалась плата датчик скорости в акпп 722.6 это не страшно ? Для акпп говорят просто замена платы флекса и все, незначит ли это что акпп скоро конец?
Hello I have the same car that you have. I bought two senders for both sides to change with old ones. the right side was easy but the left side was difficult. I pulled the sender unit with plastic hoses, which comes with a tank -built in. unfortunately hoses are broken when I just saw it coming near the exit hole. I tried to pull them to open the lock to release them from the sender unit but it breaks suddenly. i am in bad mood. I tried to be careful in this but ,,,,,, the hoses, which come inside the tank was hard and dry. please can you help me with what i have to do here? please best regard Musa
Hi Musa. Not a good situation. Obviously you need new hoses, im not sure if you can buy these hoses and can you get your hand inside the tank to figure out how replace them. I assume there are some kind of clamps inside the tank to hold these hoses in certain position. Worst case scenario - You might need to buy another fuel tank .
Hi Andy extremely helpful video thank you. I really need some advice my c36 stopped running and I now think it’s a blocked fuel tank. Tank shows half a tank but reserve light is on . I have tested that I get spark and fires when I put easy start in air box and it fires up. New fuel relay and 12 v to fuel pump - so replaced fuel Pump. When I replaced fuel pump and filter not much fuel came out ! I’d have thought having Hal a tank loads should have come out ? I’d really appreciate any advice on what to do next ? Dave getting desperate 😳
Hi David. you gonna have to get inside the fuel tank. and see the condition of the transfer pump and hose. seems like its a very common problem. the fuel doesn't get transferred from right side to left side of the tank. so fuel level still shows half a tank . but in fact the left side of the tank is empty . and this is whre the intake for the fuel pump is connected
Andy silly question but is the transfer pump in the right or left sender unit ? I have purchased a new left side sender unit . I’ve not got inside yet ordered the groco tool but not arrived yet
@@AndyPMercedesBenzChannel Thanks Andy I hapurchased a new unit for the left and it seems that Mercedes don’t do the right hand side anymore - thanks for your help I will replace and see how I get on I have also got a new filter fingers crossed
Just a thought why not drive the car till you have very little fuel then do the job so you won't have to deal with so much gas? Other than that your video was very informative
Ok cool, one more question can you use the existing pump to get the fuel into your container by connecting a hose or does it not get enough out of the tank?
I experience 2 times fuel tank problem, both end up changing new & used tanks. Problem are the impact on tank broke the inner hose....ends up only 1/2 tank of fuel can be used...need to top up fuel when gauge showing 1/2 tank. Be Careful Car too lowered like to bump impact to tanks..
@@AndyPMercedesBenzChannel I heard those sensors easily get gunked up over time. Common problem with the W202's. I am hoping after driving my car for a while after mixing that mystery oil and fuel after a few fill ups it will make the problem go away if not help it be more accurate.
I don't remember any pressure sensors on my sending units. I think its on the newer models. mbworld.org/forums/c-class-w202/406763-98-c230-p0450-code.html
@@AndyPMercedesBenzChannel i have a 98 w202 and the sending unit looks different. The link you sent me to states that the passanger side contains a fuel tank pressure sensor. Any experience with this sensor on a w202? If its not there do you know where it is?
Hello, I have an interesting question Perhaps you have never seen such a car. :) So on a regular w202 the fuel pump has 2 inlets: one big, one small, both go from the tank to the pump. But in my car, the small fuel tank pipe is cut and blocked. Fuel pump replaced with w210. There is only one big pipe from the tank to the pump. Fixed as w210. What are the consequences of this? I'm interested in your opinion...?
Looks like its only using half of the tank, watch the video carefully i explained how the venturi pump works. It pumps fuel from one side of the tank to another.
Добрый день, Андрей. Хотелось бы уточнить, так как английский язык не понимаю, но суть что надо делать понял, поможет ли вся это операция устранить так называемую болячку С класса "пол бака"?
есть две причины, 1, это указатель уровня и 2 это обрыв трубки внутри бензобака, он перекачивает бензин из правой половины в левую через насос Вентури (смотри Гоогле) , очень часто эти трубки обламываются. По- любому надо вскрывать бензобак и смотреть в чем проблема,
Я поменял обе перекачки , цена правой 170 евро ,а левой 150 евро и проблема осталась . Затем поменял бензонасос с фильтром и фильтр тонкой очистки находящийся на рампе у мотора . Начинать надо было бы в другом порядке , но так было по советано другом - механиком ибо в других случаях именно так была устранена причина..
Před 5 lety
Hi, in my W202 200 cdi , approx 8 liters of fuel will stay in the tank and the car won't start. As you mention this is the amount of the reserve fuel. Is this video applies to my case?
Im not 100% sure but I would think that all w202 use same fuel system. On the LH side sending unit there are connections for 2 lines, one suction line to supply fuel to fuel pump and another to pump fuel from RH side to LH side of the tank. It uses the venturi effect to pump the fuel. I think you have a problem with this line, either the line is broken, plugged or something is wrong with venturi pump.
Před 5 lety
AndyP Mercedes-Benz Channel Thank you, I will have a look! Your channel is amazing, keep up the good work!
I have a 1999 C280 and the fuel gauge isn't giving me an accurate fuel level reading where I ran out of gas. I heard by adding mystery oil in the fuel tank that it can correct this issue. Has anyone else been successful in fixing this problem with the mystery oil than dropping the tank and replacing the fuel tank sending units? Thanks
I've used seafoam few times, and it worked fixing faulty sending unit, but after car was parked outside for a year the seal developed a leak , so I decided to clean them .
I need advice please C300, 2008. My fuel gauge repeated shows empty after 4 attempts at repairing it at Mercedes Benz Service Center for the past 5 months every few weeks. They replaced my fuel pump and sending unit, replaced my fuse box and replaced both my FR sway bar links in April 2023. They gave me a refund of $2,673.42 on September 22, 2023 for the many attempts that did not fix it. The declared it was fixed on September 7, 2023. It shows empty again 9/21/2023. Please HELP???
Hi Im not very familiar with newer MB's. Im just a DIY mechanic, My suggestion, take it back or find an independent mechanic . Sorry that's all i can help you with.
На моем w202 засветился р0450 код. Подскажите пожалуйста на какой стороне находиться датчик давления системы улавливания паров топлива - левой или правой. Спасибо.
@@AndyPMercedesBenzChannel пожалуйста помогите найти где находится датчик давления паров топлива на Мерседесе 202.023. я думал что на fuel sending init, но там только один электрический разъем.
@@mtcru czcams.com/video/KWLddboBvRA/video.html это система на моем ц280 95 года. Go Here and enter your VIN www.auto-parts.spb.ru/cat/cats/m.mycat?cat=mb&client=dr2000, find fuel system and then evap system.
@@AndyPMercedesBenzChannel на правой стороне. Там есть в отличие от левой стороны дополнительный трех контактный эл. разьем. И я думаю этот разъем как раз для датчика давления системы улавливания паров топлива. Спасибо.
@@AndyPMercedesBenzChannel Andy does the fuel fill on the right side and the Venturi pump to the left ? Then does the fuel go to the pump from the left saddle bag ? Could this be why my reserve light is on and no fuel even tho it says half a tank ? Could problem be left sender unit ? Dave
Hey, I‘ve an issue with my C240. The car stops running when half the tank is depleted. That probably means that the Venturi siphon on the left unit is probably broken. It should be enough to change just the left unit, right as the siphon is included in the sending unit or am I wrong?
@@AndyPMercedesBenzChannel No, the sending units are very reasonably priced at around 50€ on average. The previous owner told me though that he already had the fuel pump and filter changed. So the possibility of a clogged filter resulting in too little pressure in the left unit is out of the question probably yes?
Most likely it's not a filter or pump problem, you can confirm by taking fuel pressure reading at the fuel ramp. From what I've learned mainly it's the transfer hose issue. Not so much the venturi pump itself, but the hose. Until you open the tank you can confirm the problem, you can get the sending unit if u can return it in case you don't need it.
how is the pipes function on rhs my fuelevels work fine how does the fuel get to the rhs if the rail pushes the fuel all to the left tank my pump works fine why DOESENT MY TANKS EQUALISE WHERE DOES THE LHS GET DRAWN FROM ??? ITS A COMMON PROBLEM THAT NOBODY OF THE BOFFINS EXPLAIN HOW DOES THE FUEL GET TO THE PUMP SIDE OF THE TANK ON A FKN W202
@@nikben968 Есть авто субтитры... внизу справа надо нажать на опцию субтитры потом в настройках Выбирайте опцию автоматические субтитры и Там выбираете язык русский. Я попробовал у меня работало
Hello Andy. I want to thank you to make a such video with great explanation! I have driving this car since 2009 and faced with this issue several years ago. Servicemans in our country told me that the sensor is not repairable and sensor is expensive in our country. But after watching your video I can understand that everything is possible if you really want to do it. Big thanks from Azerbaijan!!❤
Thank you. This is why i like these cars, most of the components are possible to disassemble and fix using simple tools and basic mechanical knowledge.
This video helped me like no other video and I have worked on many things. AndyP you are the man! Also love the "Digital" jacket you started the video in... I worked for that company when I was in College in the 80's PDP 11's and VAX 780's and of course all the peripherals. Again thanks 1998 C280 sport, 2015 E350
thank you very much. I'm glad it helped you. I guess we are the Dying Breed, we like to fix stuff rather than replace
Hi Andy! Your video helped me to understand the problem and how to solve it. Thank you very much! Regards from Brazil.
Really good vid. Good explanations. Good camera view. Thank you.
Super walk-through. Thank you ever so much, just saved a bunch of money !
Groco SW2531 spanner wrench, $25 on amazon, used for deck plates in marine applications. Good tool! Great video, thanks Andy.
Great tip! Thanks
gracias de nuevo excelente aprendi mucho hoy como los otros dias, saludos desde paraguay
(thanks again excellent I learned a lot today like the other days, greetings from paraguay)
👍
Thanks you for your video, I am from Brazil!! I have a your problem in my Mercedes.
Glad to help
Thank you so much for the video. I think I found what is the problem with my W202.
You are welcome, seems like this is a very common problem with w202
Hi Im Shake from Malaysia..Im just having my 2nd W202 couple month ago. Earlier C180 since 2006 now C220 4 speed W202..Some restoration could be needed for my 1995 W202..Find very useful video from you tq.
Hello
thank you for this making this videos
Thanks for the video
Hey, great vid, question, was there fuel leaking from the sending unit as soon as I unscrew that Hex screw where you drain from the check valve, reason I'm asking is because I think I have a bad check valve, my fuel pressure is not up to spec, I've changed out fuel pump, fuel filter, all cracked hoses I saw, schrader valve, and purchased some refurbished fuel injectors for $30 each (all six injectors), car runs but idles rough intermediately
I was thinking may be soaking/spraying the parts that have oxidation with a very mild acid solution like CLR or The Works Tile cleaner rather than sanding. The solution will get into areas the sand paper cannot reach.
Thank you I was need that solation to my car
Ottimo
Gracias muy bueno
Hi, great video but I was wondering where did u hook up your ohm meter to in order to measure the ohms. Thanks
on the bottom of the sending unit you'll find a plug connector
I made the tool with a piece of plate steel, a big nut, and 4 bolts and nuts.
did it work OK?
Yeah, I have used it several times. Sure beat paying big bucks!
Thanks for useful video Andy, do you know what the hoses from left hand unit do and what are they connected to please? Mark
You mean the hose inside the tank? It pumps fuel from one side to the side that pulls fuel to the fuel pump. Thete's a ventury pump that this hose is connected to
@@AndyPMercedesBenzChannel Thanks Andy, it wasnt the pump that was the problem, as far as I can see..Car still has a mystery misfire but its much less after timing chain change, and all obvious tweaks.
Thank you for the video. I didn't have a jack or floor jacks that was able to lift my car high enough to fit a 5-gallon jerry can. I also noticed my existing wire connector is round while the sending unit connector on the new one is rectangular....did you have that problem? Did you splice or run a new wiring harness completely?
Oh yeah....I also read online that Mercedes had a recall on their original sending units because of the contacts corroded easily causing a poor electrical connection. Their newer sending unit contacts are supposedly gold-plated to better resist corrosion....how can we tell if the new sending units are the right ones?
One more question...sorry...while you were down there performing sending unit repairs, did you or have every replaced your fuel tank screen? I bought a new one and will replace since I am doing the sending units....
I used existing sending unit, so no problems.
Im not aware of it.
I haven't changed the screen.
Hi, thanks for video. I just need to replace seals. Should I remove sending units completely?
I think so, as I recall the seal goes under the sending unit plate.
...this one is a very helpful video!👍👍👍
However, question.. if we just need to drain out the fuel tank, can we just loose off those two bolt (using a hex tool), slide in the hose and carefully pushing the hose up to move up the valve (the white valve).
Will the fuel come out via the hose?
thank u. awaiting your answer soon.
Mine is w202 c200.
You could do it much easier without the hose and fitting. Remove the plug and push in a big screwdriver, it will push the ball in the check valve up and will let the fuel out. It might get messy cause youll get fuel everywhere. Using the hose makes it much cleaner
@@AndyPMercedesBenzChannel ..great! thank you. will do it using the hose.
Anyway, what is going to happen if after both part of the tank was empty (LH and RH), i fill the fuel into the tank (around 20litres; probably will only fill up the RH part) ?
will the engine able to start and well running (with the LH part empty) ?
@@geochannel8593
Interesting question... But i didnt have any problem starting the car and it ran fune.
@@AndyPMercedesBenzChannel i'm sorry, i didnt get it. Did u mean you have no problem starting the engine with only one part of tank empty (LH)?
@@geochannel8593 this is what ive done, ive drained both sides of the tank, replaced seals on both sending units and then put about 10 litre of fuel into the tank. Fired the engine and like i said... No problems. If you watch the video carefully i explained how the fuel gets from RH side to LH side.
Hello Andy. Awesome video. I'm about to take on this repair job myself. I have a few questions and I'm really hoping there's a way I can reach out to you for a little assistance. Thank you in advance
Hi Garren. you can email me aiptech1@gmail.com, if i can answer your questions
Hi Andy. I have the fuel leak on the right hand side also when I pump fuel it leaks onto the ground. What part of the tank is leaking in your experience? Would it be from the sender unit, or from the anti splash tank part?
Rhs ,it's where the gas tank cap is. I can't tell u exactly where the leak is. Pull the tire off and then the plastic to get to the filler neck.
@@AndyPMercedesBenzChannel okay thanks alot. I will give it a go. However my fuel gauge isn't working either so will have to do this fix on the video. Cheers your videos are awesome.
Great video brother SW2531 on eBay and it's $24
Thanks.
👍
Hello Andy, Andy my fuel leak seems to be coming from the plug itself?
Can I buy the rubber seal for the plug alone?
Kind regards Karl
Im not sure, but you can try your local MB dealer
The ring that holds my sending unit is stuck and the tank twists so bad I am afraid it will crack 😭I have a spare one, but I am too lazy to swap the whole thing. And on the spare one, I also cant remove the ring! WTH is with my luck?!
Oh and to top it all off, the metal half of the small crooked hose coming from the sending unit is rust as hell and I am afraid it will break. I have no idea how to find it (if it exist as a part) or how to swap it with a hose, considering its crooked like that...
влияет ли этот Fuel Sending unit на работу двигателя и коробки передач машины когда работает так что стрелка уровня топлива прыгает верх/ вниз ???
Нет, это показывает только уровень топлива. Надо почистить и подогнуть контакты.
Hello Andy. Brilliant video.
I've been trying to drain the fuel tank via the method you described.
However, pushing the valve on either sending unit with reasonable force (and a screwdriver) releases only a small dribble of fuel.
Disconnecting the hose on the left sending unit released no fuel at all.
The car (1993 W202 c180) has been sitting on my front porch for nearly 7 years. It has not been started since then. I am quite sure it was left with a quarter to half a tank of petrol inside. The petrol will most certainly be completely rancid by now, as such I am trying to remove it.
I added around 10 litres of fresh petrol recently when I first tried to start the car again (this was before I discovered old petrol was still inside).
However, I am still unable to drain this or any petrol.
Could I be doing something wrong? Maybe I am not using enough force with the valve?
Regards,
R.K.W
Hi. The check valve doesn't need a lot of force. There's a much easier way to drain the tank: disconnect the fuel hose after the pump. Pull our fuel relay and jump the contacts. But I'm afraid the fuel has turned into jelly and will cause more damage.
@@AndyPMercedesBenzChannel Hi, thanks for the quick reply. I will assume that the fuel gel should be removed before adding fresh fuel. Is there an easier way to do this without removing the whole tank?
@@ragtimer I don't know if there are any chemicals that will dissolve what's in the tank. I haven't explored this issue.
Great video, thanks! Quick question: My 1998 W202 (C230) had really bad gas (dark brown and nasty smelling), so I drained it out of the drain plugs just like you did except I used a Hold fluid extractor. It emptied quick. Then I put 2 gallons in it and ran it for about 15 minutes. Then shut it off. After about 30 minutes I tried starting it and it wouldn't start. So I did some tests and discovered that the fuel isn't leaving the gas tank and feeding the fuel pump. I watched another YT video showing a later model W211 and they show that the plastic hoses crack and break. But they access them from under the seat, and it's way easier than mine. But I don't know if that's causing it or what tests to do to make sure it's bad hoses. Do you have any ideas why that's happening and how to fix it?
first see if the fuel pump is still working, when you turn the ignition on you should hear the pump running. then check if the fuel actually gets to the pump
@@AndyPMercedesBenzChannel
Thanks for your quick reply. I had to replace the pump b/c the existing one was totally plugged and corroded (I cut it open).
So I checked the supply and return lines and they're clear from front to back. I determined that there is no gas coming out of the tank to feed the fuel pump. So I unscrewed the discharge nut and found it clear, and no debris in the feed-well. So that screen isn't plugged either.
At this point I'm beginning to believe something is broken inside the tank. Any ideas what else can be causing no gas to get into the feed-well inside the tank?
I read somewhere that the return line flows through a venturi which siphons gas causing it to flow between the tanks and fill that feed-well. If that's true, then how do you go about priming that return line if no fuel is in that feed well to be pumped through it?
I don't know enough about this system to know how to troubleshoot it any further. Appreciate any help you can give.
@@AndyPMercedesBenzChannel
Turned out to be the bellows type elbow on the feed well was disintegrated. Need new tank. OH BOY! Mercedes SHYT strikes again! Now I'm remembering why my main ride is a Honda Accord.
@@chriscadman5715 that's a bummer... good luck. Hope you can fix it
@@AndyPMercedesBenzChannel
Thanks. A new MB tank is about $1k, so that's not an option. I'm going to cut up the tank and install a removable port designed for fuel tanks. Hopefully that'll do it. That way I can fix it any time I want in the future. I also need to fix the RH side level sensor, b/c the plastic hose disintegrated at the bottom and the o-ring seal for the sensor blew out. I'm almost done with that. Just need to find submersible gas line that won't break the bank.
Если сломалась плата датчик скорости в акпп 722.6 это не страшно ? Для акпп говорят просто замена платы флекса и все, незначит ли это что акпп скоро конец?
НЕТ это не страшно, обычно замена платы и сброс ошибки решает проблему, если конечно проблема не в механике.
Hello
I have the same car that you have. I bought two senders for both sides to change with old ones. the right side was easy but the left side was difficult.
I pulled the sender unit with plastic hoses, which comes with a tank -built in. unfortunately hoses are broken when I just saw it coming near the exit hole.
I tried to pull them to open the lock to release them from the sender unit but it breaks suddenly. i am in bad mood.
I tried to be careful in this but ,,,,,,
the hoses, which come inside the tank was hard and dry.
please can you help me with what i have to do here?
please
best regard
Musa
Hi Musa. Not a good situation. Obviously you need new hoses, im not sure if you can buy these hoses and can you get your hand inside the tank to figure out how replace them. I assume there are some kind of clamps inside the tank to hold these hoses in certain position. Worst case scenario - You might need to buy another fuel tank .
Hi Andy extremely helpful video thank you. I really need some advice my c36 stopped running and I now think it’s a blocked fuel tank. Tank shows half a tank but reserve light is on . I have tested that I get spark and fires when I put easy start in air box and it fires up. New fuel relay and 12 v to fuel pump - so replaced fuel
Pump. When I replaced fuel pump and filter not much fuel came out ! I’d have thought having Hal a tank loads should have come out ? I’d really appreciate any advice on what to do next ? Dave getting desperate 😳
Hi David. you gonna have to get inside the fuel tank. and see the condition of the transfer pump and hose. seems like its a very common problem. the fuel doesn't get transferred from right side to left side of the tank. so fuel level still shows half a tank . but in fact the left side of the tank is empty . and this is whre the intake for the fuel pump is connected
Hi Andy thank you for getting back to me I’ll let you know how I get on
Andy silly question but is the transfer pump in the right or left sender unit ? I have purchased a new left side sender unit . I’ve not got inside yet ordered the groco tool but not arrived yet
As I recall it's on the left side.
@@AndyPMercedesBenzChannel
Thanks Andy I hapurchased a new unit for the left and it seems that Mercedes don’t do the right hand side anymore - thanks for your help I will replace and see how I get on I have also got a new filter fingers crossed
Just a thought why not drive the car till you have very little fuel then do the job so you won't have to deal with so much gas? Other than that your video was very informative
Well.. that would be too easy....
Actually the car wasn't insured..
Ok cool, one more question can you use the existing pump to get the fuel into your container by connecting a hose or does it not get enough out of the tank?
I experience 2 times fuel tank problem, both end up changing new & used tanks. Problem are the impact on tank broke the inner hose....ends up only 1/2 tank of fuel can be used...need to top up fuel when gauge showing 1/2 tank. Be Careful Car too lowered like to bump impact to tanks..
Also...which aftermarket sending units are the best for this car if the mystery oil doesn't work? They don't make the OEM's anymore for this car.
I don't know about aftermarket sending units, but these are very easy to clean.
@@AndyPMercedesBenzChannel I heard those sensors easily get gunked up over time. Common problem with the W202's. I am hoping after driving my car for a while after mixing that mystery oil and fuel after a few fill ups it will make the problem go away if not help it be more accurate.
Which of the two sending units has a pressure sensor? Any experience with check engine code P0450 on a W202?
I don't remember any pressure sensors on my sending units. I think its on the newer models.
mbworld.org/forums/c-class-w202/406763-98-c230-p0450-code.html
@@AndyPMercedesBenzChannel i have a 98 w202 and the sending unit looks different. The link you sent me to states that the passanger side contains a fuel tank pressure sensor. Any experience with this sensor on a w202? If its not there do you know where it is?
@@predrag1 P0450 is the evaporative system code, why are you looking in fuel sensing unit?
czcams.com/video/KWLddboBvRA/video.html
Hello, I have an interesting question Perhaps you have never seen such a car. :) So on a regular w202 the fuel pump has 2 inlets: one big, one small, both go from the tank to the pump. But in my car, the small fuel tank pipe is cut and blocked. Fuel pump replaced with w210. There is only one big pipe from the tank to the pump. Fixed as w210. What are the consequences of this? I'm interested in your opinion...?
sorry, Not sure
Hai there my Benz is a 202 but it keeps going off when it finishes the bank were the fuel pump is why?
Looks like its only using half of the tank, watch the video carefully i explained how the venturi pump works. It pumps fuel from one side of the tank to another.
Добрый день, Андрей. Хотелось бы уточнить, так как английский язык не понимаю, но суть что надо делать понял, поможет ли вся это операция устранить так называемую болячку С класса "пол бака"?
есть две причины, 1, это указатель уровня и 2 это обрыв трубки внутри бензобака, он перекачивает бензин из правой половины в левую через насос Вентури (смотри Гоогле) , очень часто эти трубки обламываются. По- любому надо вскрывать бензобак и смотреть в чем проблема,
Я поменял обе перекачки , цена правой 170 евро ,а левой 150 евро и проблема осталась . Затем поменял бензонасос с фильтром и фильтр тонкой очистки находящийся на рампе у мотора . Начинать надо было бы в другом порядке , но так было по советано другом - механиком ибо в других случаях именно так была устранена причина..
Hi, in my W202 200 cdi , approx 8 liters of fuel will stay in the tank and the car won't start. As you mention this is the amount of the reserve fuel. Is this video applies to my case?
Im not 100% sure but I would think that all w202 use same fuel system. On the LH side sending unit there are connections for 2 lines, one suction line to supply fuel to fuel pump and another to pump fuel from RH side to LH side of the tank. It uses the venturi effect to pump the fuel. I think you have a problem with this line, either the line is broken, plugged or something is wrong with venturi pump.
AndyP Mercedes-Benz Channel Thank you, I will have a look! Your channel is amazing, keep up the good work!
How did you get on ? I have a similar issue
Thanks Mr for imparting the knowledge .your video it is of great importance and so helpful ki
I have a 1999 C280 and the fuel gauge isn't giving me an accurate fuel level reading where I ran out of gas. I heard by adding mystery oil in the fuel tank that it can correct this issue. Has anyone else been successful in fixing this problem with the mystery oil than dropping the tank and replacing the fuel tank sending units? Thanks
I've used seafoam few times, and it worked fixing faulty sending unit, but after car was parked outside for a year the seal developed a leak , so I decided to clean them .
I need advice please C300, 2008. My fuel gauge repeated shows empty after 4 attempts at repairing it at Mercedes Benz Service Center for the past 5 months every few weeks. They replaced my fuel pump and sending unit, replaced my fuse box and replaced both my FR sway bar links in April 2023. They gave me a refund of $2,673.42 on September 22, 2023 for the many attempts that did not fix it. The declared it was fixed on September 7, 2023. It shows empty again 9/21/2023. Please HELP???
Hi Im not very familiar with newer MB's. Im just a DIY mechanic, My suggestion, take it back or find an independent mechanic . Sorry that's all i can help you with.
На моем w202 засветился р0450 код. Подскажите пожалуйста на какой стороне находиться датчик давления системы улавливания паров топлива - левой или правой. Спасибо.
С левой стороны.
@@AndyPMercedesBenzChannel пожалуйста помогите найти где находится датчик давления паров топлива на Мерседесе 202.023. я думал что на fuel sending init, но там только один электрический разъем.
@@mtcru czcams.com/video/KWLddboBvRA/video.html это система на моем ц280 95 года. Go Here and enter your VIN www.auto-parts.spb.ru/cat/cats/m.mycat?cat=mb&client=dr2000, find fuel system and then evap system.
@@AndyPMercedesBenzChannel на правой стороне. Там есть в отличие от левой стороны дополнительный трех контактный эл. разьем. И я думаю этот разъем как раз для датчика давления системы улавливания паров топлива. Спасибо.
Maşının ön hissəsindəki havalandırma qapağını necə düzəltmək olar
❓
Is there a second fuel pump inside the tank?
No, its not a fuel pump. Its a ventury pump to transfer fuel from right tank to left.
@@AndyPMercedesBenzChannel
Andy does the fuel fill on the right side and the Venturi pump to the left ? Then does the fuel go to the pump from the left saddle bag ? Could this be why my reserve light is on and no fuel even tho it says half a tank ? Could problem be left sender unit ? Dave
Hey, I‘ve an issue with my C240.
The car stops running when half the tank is depleted.
That probably means that the Venturi siphon on the left unit is probably broken.
It should be enough to change just the left unit, right as the siphon is included in the sending unit or am I wrong?
Previous owner changed the fuel pump btw. It should be located on the right side yes?
Left side behind a plastic cover.
People say new sending unit is expensive , so I'd check first...it could be a damaged hose that siphons the gas from rhs tank
@@AndyPMercedesBenzChannel No, the sending units are very reasonably priced at around 50€ on average. The previous owner told me though that he already had the fuel pump and filter changed. So the possibility of a clogged filter resulting in too little pressure in the left unit is out of the question probably yes?
Most likely it's not a filter or pump problem, you can confirm by taking fuel pressure reading at the fuel ramp. From what I've learned mainly it's the transfer hose issue. Not so much the venturi pump itself, but the hose. Until you open the tank you can confirm the problem, you can get the sending unit if u can return it in case you don't need it.
why did you not take camra under the car
I did for install, removal is pressy simple
how is the pipes function on rhs my fuelevels work fine how does the fuel get to the rhs if the rail pushes the fuel all to the left tank my pump works fine why DOESENT MY TANKS EQUALISE WHERE DOES THE LHS GET DRAWN FROM ??? ITS A COMMON PROBLEM THAT NOBODY OF THE BOFFINS EXPLAIN HOW DOES THE FUEL GET TO THE PUMP SIDE OF THE TANK ON A FKN W202
Do you know what a venturi effect is and how it can be used to make a pump? Google it, the rest I explained in this video.
Если бы ещё было бы на русском было бы круто 😐
Субтитры будут скоро
@@AndyPMercedesBenzChannel спасибо👍
@@nikben968
Есть авто субтитры... внизу справа надо нажать на опцию субтитры потом в настройках Выбирайте опцию автоматические субтитры и Там выбираете язык русский. Я попробовал у меня работало
@@AndyPMercedesBenzChannel я включил субтитры они работают но на английском а выбора на русский нету
@@nikben968 справа от кнопки "субтитры" у меня "настройки" и там опция выбор языка для авто субтитров