I got a problem with the rear left power window, the window didn't went down just made the up movement. The switch was already tested, it was O.K, voltage was measured, there was 12 VCC for the up motion, VCC for light bulb and the ground was present too; but there is not present the voltage for the down motion. Somebody can help me. My car is a Mercedes Benz 1987 300D turbo.
Thanks
Brian

 

I pulled the door pannels and tore the motor apart cleaned the armiture lubed the shafts and got mine working. Theres a plastic plug on the shaft housing from the motor you can pull that and spray some lube in their it helped one of mine that was partcially working before. Hopefully you like to tinker the tracks and motor probely all need cleaned and lubed