Hi! I have a w202 125 250 D mercedes from 1994. I have some problems with heating system. It is always making hot in both sides air exits and cold in the midle, in any switch position.
Can anybody help me?
Thanks
Francisco

On my 97 C280 there is a white plastic vacuum tube that runs along with the engine computer wiring harness, I'd have a look at that first. Past that, I don't have any diagnostic information for you since your control will be different than mine.