CLK 550 Cabriolet (209.472) V8-5.5L (273.967) (2007)
Air recirculation switch (N22s2) (vehicles as of model year 09/ YoM 08 with code (494) USA version or code (460) Canada version)
Briefly pressing the air recirculation switch (N22s2) for < 1.5 s closes the fresh and air recirculation flap to stop air entering from outside. The LED in
the air recirculation switch (N22s2) lights up during operation.