w140-s500

Hey everyone, hers the thing. i recently was having a power supply problem with all my windows. so the diagnosis was the comfort module in the trunk. i bought a parts car cause the dealer price for a new one was $3,300. so i took the module out of the other car and put it in mine, and the window problem was fixed. heres where it went sour. the windows still work good but as soon as i installed the module......... the sunroof stopped working and even more crazy, i have no heat from the driver side part of the car. ac is mint. but no heat from only the driver side. even when i put it on defrost, the driver side blows cold and the passenger side blows hot. so i thought it could be a problem with the new module, so i installed the old one again and everything still does not work............ help