now that I have my door panel off, I noticed, when lowering my right rear window on my '87 300D, it goes tooooooo far down, and now won't go far enough up!?

how do you correct this!?

__________________
Matthew McIvor

2016 E350 4Matic Black/Black
2007 GL450 4Matic with Off-Road Pkg Silver/Black
1995 E300 Diesel White/Gray
1994 S600 Euro Black/ Black Velour
1986 560SL Blue/Blue/Gray
1986 190E Blue/Blue 93k