Zerocarpileup

2008 S63 sometimes when first starting the car I find the blower blowing on full blast. I have no way of shutting it off. Even when front climate control is in off position on command screen. Only thing I can do is cycle between the windshield defrost but never completely shut off.
Front blower motor and resistor have been replaced and problem persists.

Today i noticed when the blower was full blast again that the rear climate control was at full blast auto. When I clicked the rear control to “off” position everything even the front went back to normal.

Whats happening here? What could cause the rear climate control to power on in its own and cause everything to blow full blast?

adrian-MBfan

mine is stock in high heat, did you resolve yours?