The A/C blower wanders from almost off to high without apparent reason, and
randomly it seems. I see that it has an electronic control module that cost
$200+ to replace. On such an old car it doesn't make sense to replace it
when you could just bypass it and let it run on HIGH all the time. THis
wouldn't create a problem would it? But the problem is, I don't know where
this module is. I see what looks like an ECM module behind the under-dash
cover panel, just to the left of the steering column, I think. Is that it?
Maybe it's the sensor input. On my 300D cabin air is pulled over a
temperature sensor by a vacuum. When the soft hose gave out, I got wild
oscillations in the climate system.
For me, the hose was accessed by removing the glove box liner... not
sure about the 300SD.
Jim Caldwell wrote:
(Ron sent this to me in error, I'm passing it along to the group)
Sure, mine stopped running altogether.
The control is over the passenger's
left foot. A long plug has a series of pins
that go into holes. Unplug it and run
a jumper wire to run it on a moderate
speed all the time. High speed might overheat
something and it's too much noise anyway.
Let me know if you need more info.
Your 126 body has at least 3 ECM's: one for the cruise [it is above the brake
pedal], and two for
the ACC [one for the temp control and one for the blower control], they are on
the right end of the
heater case. Do you have turn knobs for your climate control or 5 pushbuttons
You need to specify since your news system uses a berlin.de address.
If your 85 is like a USA 84/85 300SD, then it has a 4th ECM for EGR contol.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.