Dear all
the PO of my car messed up the AC system's wiring pretty bad, summers are starting so i thought I should have a go and got a wiring diagram for the AC system for a 97 W202. That was all I could find :s

My 202 is a 1993 model with 1800cc and 5sp manual transmission. I need the wiring diagram for the Air conditioning system. I don't know what is the system is called exactly but the controls have two knobs, two dials and four bottons (REHEAT, EC, REST, VENT).

I'd really appreciate if someone could get me a wiring diagram for my car.. chassis no: WDB2020182F017766

thanks

 

So i've got all my wiring corrected up and most of the things are working now.

I found out that the PO has REMOVED the evaporator temperature sensor for a reason that only GOD knows.

Anyways, i've ordered the part (part#210 830 07 72) and I was testing in the time being - fixed a evap sensor out of a corolla the, compressor runs but doesn't trip making things ICY. anyways, I can't seem to make the vents work properly, they work on vacuum and also the heater isn't working (i have replaced the duo valve and installed new coolant pipes). When I turn the dials to the heater, shouldn't it turn the compressor off and start blowing in warm air? or am I getting it wrong?

I have checked the vacuum switchover valve (y11/3) manually, it has four solenoids inside and all are working, when engine is running the vents and flaps actuated by the vacuum are working. but when I connect the valve and the CCU, the vacuum switchover valve doesn't seem to receive any input from the controller? is my CCU bad? :s

 

hey bro i have a 1997 c280 and we cant get the center vents to work on my a/c also sometimes the a/c doesnt come on, i turn off the key and try again most times it comes on sometimes it doesnt. any ideas or help is appreciated.