Hello,

Problem: no blower, have ambient heat and directional control.

I just changed the control module and tested the fan (both new and OK) on my 90 300TE.

I should have listened earlier, but now I'm hearing a buzzing from something (?) right below the washer fluid tank. I'm guessing this is my problem.

Can anyone assist in telling me what this part is and if a swap out is as easy as it looks?

Thanks.

Doug

Could be the aux water pump, which sits on the coolant line from the pass. side of the block to the firewall, although some vibration should be normal. Purpose of the pump is to keep hot water flow to the heater core up when the engine is idling, but it shouldn't be necessary once the car is moving. Maybe the monovalve is shot? That sits on the same coolant line by the battery, I think.

Doug,
Have you checked the blower fuse? To properly check it you should remove it from the holder. They'll get hairline cracks that are invisible to the eye but will fall apert when their unscrewed from the holder.
Hazen Arnold
91 300TE 4Matic
134k mi.
P.S. You can call or e-mail this guy. He is the guru of ACC and cruise control. He is a competitor of Mercedes shop, si I'm a bit leary of posting him here.
george_murphy@compuserve.com
865-482-9175
9 am to 5 pm ET voice or fax

__________________
Hazen Arnold
Happiness is a well stocked
garage.

Hello,

Thanks for the replies.

I checked the fuses, all OK, and (if I'm remembering right) the fuse on the TE works some other 'things' as well.... and they all work.

Doug

Doug,
The 30 A blower fuse is dedicated to the blower. It sits in its own holder on the left fender.
Hazen

__________________
Hazen Arnold
Happiness is a well stocked
garage.