Paranormal Window Activity w140

Ok, here's a new one for me, after a relaxing dinner i returned to my 1992 300se and the passanger side rear window was half down. I know it was up, im not seeing things (i guess)! Well everything worked normally except it went up some and then back down when i tryed to raise it...the second time i pressed the express up button it did however roll all the way up, but why was it down? Any insight? Thanks in advace...

[chowpit]

This usually occurs when the window binds on the way up. Its a safety feature that is built in the system to prevent little heads from being cut off. The window will automatically roll back down. Clean the channel and lube with a quality silcone or other lube that is made for that type of material.

Thanks for your help...after lubing the tracks this has not happened again

[mr. Goodwrench]

If your car has the original rear window lift mechanisms there is a good chance that they need to be replaced due to a broken nylon link in the lift cables. I had to replace the lift mechanisms in both rear doors on my wifes '93 300SD. The replacement parts are about $70.00 each and are a vast improvement with the nylon part being replaced with aluminum. The windows would creep down gradually hitting bumps. I would just press them up and they would stay in place due to friction in the tracks. When I finally found out how to get the door panels off without breaking anything I installed the new parts. Door panel removal has been covered on this forum in the past. Use the search function.