[W126 Coupe] window motor/regulator

[Dick Spellman]

Hi Alex:

You can get the window down to remove the regulator where the motor has 
failed but, it's a bit of work.

On the back side (not visible) of the motor and at the top of the motor 
where the regulator portion (with teeth) passes through the motor teeth 
is a metal plate.  This plate is secured by two 8mm (I think that's the 
right size) stubby bolts.  Removal of this plate frees the regulator 
from the motor which will allow the window glass to move freely as the 
regulator arms are no longer tethered to the teeth locked to the dead motor.

I usually disconnect the power at the screw terminals on the door frame 
then drop all the door frame bolts holding the regulator, arm and motor 
to buy some room and allow the window to drop a bit making the motor 
plate more accessible.  I'd place a nylon or plastic wedge or two in the 
outer door weather strip to lock the glass in place just before you are 
ready to remove the motor plate bolts.Then fit a short socket by hand 
(to get correct size) followed by your 1/4 drive socket wrench.  A 3/8's 
drive will not fit.  ALL of my work of this type has been on the 126 
chassis sedans not the coupe.  I think you'll find the set-up is 
identical with the exception of the larger glass and rail system 
employed in the coupe.    They wedges can be removed when your are ready 
to pull the entire regulator.

Regards,

Dick

.flakeymail-benz at yahoo.com wrote:

> Howdy,

> I have my passenger door open, I'm trying to fix the

> passenger door window.  I'm following the service

> manual instructions, but I'm stuck on setp 1 of

> removal: let crank window down.

>

> The window is fully up and I can't get to budge.  I

> have to get it down to get the motor/regulator

> assembly out.  

>

> anyone else done this, or have any hints on getting

> window down?

>

> I've tried giving 12 volts to the motor to see if the

> problem was switch/wiring to the motor but no luck. 

> ohm meter says open circuit across motor, but I don't

> know if that's normal.

> volt meter says + or - 12 at the connector depending

> on which way switch is pressed.

>

> thanks in advance...

> alex

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