only the front windows???? (300SD) - PeachParts Mercedes-Benz Forum

dmorrison · #1 12-20-2004, 11:48 PM

Quote:

Originally Posted by Richard Eldridge

It is unlikely that BOTH windows have defective motors, but it is possible.

I do agree BUT my daughters 240D rear window regulators were warped in the exact same way. I could have been a broken switch that kept power to the motor. Or a habit pattern with the previous owner. I don't know but I R+R both units and they seemed to have the same kind of failure.

Dave

ajohnson1 · #2 12-20-2004, 11:57 PM

I recently had to replace the regulator on my drivers-side, I purchased a used regulator and motor assembly from James Harris on the Mercedes List for $33, (www.mercedeslist.com for info on joining). It was a used but very good condition, and I only needed the regulator.

His email is: h16671836_at_yahoo.com (replace _at_ with @, don't want James getting un-requested spam). You can try him to see if he has others.

Regards,
Adam

jimmy hat · #3 12-21-2004, 12:02 AM

okay more info.

when bringing leads from battery and switching placement of leads on motor connections, i get nothing... well not nothing. the leads basically solder themselves to the screws. big sparks zzzz zzzz and the wire tips a blackened. this happens instantly regardless of which lead is where.

i get no groaning, humming, any noise or movement of any kind when using switches, battery, nothing.

switches are good to go.

as far as removing motor and windor regulator: according to the service manual, i need to lower the window to do it, but i can't lower the window, and thuse the cycle begins. does anyone have a nifty trick?

thanks for the input, keep it coming.... i just wish my problems stopped there

Brian Carlton · #4 12-21-2004, 12:16 AM

Quote:

Originally Posted by jimmy hat

when bringing leads from battery and switching placement of leads on motor connections, i get nothing... well not nothing. the leads basically solder themselves to the screws. big sparks zzzz zzzz and the wire tips a blackened. this happens instantly regardless of which lead is where.

i get no groaning, humming, any noise or movement of any kind when using switches, battery, nothing.

It would appear that the motor is not functioning and that Dave is, unfortunately, correct.

Quote:

Originally Posted by jimmy hat

as far as removing motor and windor regulator: according to the service manual, i need to lower the window to do it, but i can't lower the window, and thuse the cycle begins. does anyone have a nifty trick?

The last time I pulled the regulator, I believe that the window had to be in the up position. After you unbolt the regulator, you may be able to move it so that the sliding piece disengages from the channel at the bottom of the glass. I have not done the regulator on the SD in a couple of years so I'm providing advice based upon old experience.

dmorrison · #5 12-21-2004, 10:58 PM

Just wanted to post a picture of my daughters regulator. As I said the regulator was bent. this prevented the proper gear meshing and the window would click operated due to the gears not meshing correctly. The flat area should be "flat" not warped

Heres the unit new.

http://img.eautopartscatalog.com/live/O304015548OES.JPG

Dave