Summer Convenience Feature Mercedes CLK using Recirculation button.

With the air conditioning on, you simply press and hold the recirculation button until the windows and sunroof close or open.
A handy feature you might not be aware of.
For Mercedes CLK 500, 320,etc
W209 SERIES 2002 TO 2009.
May work on other Mercedes models.
CHEERS 😉 🎵