Mercedes Benz repair: 2000 clk430-fan wont stop, clk430, reset switch

Question
I just bought a 2000 clk430 used, and the battery is nearly dead because last night the comfort fan would not turn off.  Is there a "reset" switch somewhere or some other way to get the fan to turn off?  I have tried turning the car on and off, the a/c on and off and messing with all climate controls.

Answer
sounds like you have a issue, ive replaced suction fans and me control units for this problem before, without seeing the car makes it impossible for diagnoses, check fuses, then if all fuses are good, take to dealer. those get pretty complex and tough to diagnose sometimes