I let my window down and tried to let it back up and nothing. I switched around the switches and they all work. When I press the up or down button I hear a little thump from I'm guessing the window motor, but ther is no action or any other sound after that. What does this sound like to you guys? Any tests or actions I can perform to isolate the problem? I'm guessing the worst case scenario is that it's the motor gone bad, correct?

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1986 560 SEC *Sold* < Big Mistake I miss my baby!
1988 300SE *Sold*
1989 300CE - current car, but not for too long