Hi Techs out here,

I need help for my '82 W123. It is a Euro model with air-con knobs. The fan speeds 1 and 2 do not work at all, but the highest speed 3 does. I am quite sure the compressor and coil are fine as the engine idle does change when the air-con knob to turned to both 1 and 2.

I have been told that the 'resistor' of te air con unit is faulty and I should replace it. I need help for the part number (if my diagnosis is right).

On a separate matter, can anyone identify this part number 123 540 0369 ?

Many Thanks!