hi! This may be the old question from other guys.

I have 87 MB 190E 8V, the A/C doesn't work when I bought the car last winter.

Now, I want to fix it. I put the used nice compressor on (from 92 MB 190E only 65000km) and did the leaking test. I should no leaking on the A/C system.

The questions is when i try to refill the feron, the compressor not kick in. Now, I am not sure is it the climate control switch problem, A/C relay (behind the battery one), or Aux fan relay (in R2 position fuse box). I touch the aux fan relay, it is very hot, but I never see the aux fan turning.

It really seem no power to compressor.

Any suggestions, please help.