today I notice that my center console switch is not working properly ones y turn in the circular way it docent respond only when a press to the sides but not in circular movements, I don't know if there is a special function or something I need to do.

cheers

 

Seems to be fairly common failure, but easy to replace. There have been at least a couple of similar threads in the past few weeks, so just look for them and you'll get instructions how to replace it.

EDIT: https://mbworld.org/forums/c-class-w...dial-knob.html