I just replaced my AC/Heater blower motor on mt '89 300E but I still do
not get anything from the vents. I verified the fuses are good, but I
cannot even hear the AC Compressor kick in when I press the button.
Have you checked your ignition switch? Once the car is started and
running... turn back the key a bit more without shuttting engine off... does
it work? If yes, then you need to change your ignition switch.
Car turns off immediately. I did notice that the AC DOES WORK. But,
the fan will not. Which wire connection on the fan motor do I apply
voltage to to test with? I am interested to see if the motor I got is
bad, or if it is something else.
If the compressor is good, then the vacuum pods need replacing. The climate
control switch assembly might need replacing. When you open the glove box
and remove the lining, on the left there is a test panel where one can test
the vacuum of each of the pods with a vacuum meter available for cheap at
Sears. MB will charge about $3000 for the job since the dash has to come off
to get at the vacuum pods to replace them. Replacement pds can be had
discounted from Rusty Cullen at 800-741-5252. Peter
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