The driver's side window on my girl friend's ML stuck down about a third. She commonly puts both windows down about that far when she starts up in the hot Dallas weather and then puts them back up after the A/C has revved up.
I ran the window down some and then it went up fully after that. What should I look for as a cause of this condition; is something beginning to fail and if so what? All other windows are working normally at this time.
Thanks, Ben Carter

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)