yes, u need to disasemble it from the tract. i have a spare motor if u need it, i can give it to u for $50+s/h. make sure its not the fuse fisrt tho.

to disassemble it, as far as i can remember. u need to unblot the whole thing from the bod of the car, then undo take off the cover that covers the cbale to the motor. and undo 2 clips to release it. it was a lot easier when i had a spare motor to look at and it took me about an hour to swap it. make sure u save all t he hardware tho.

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198? 300D ???K - Future DD
1989 300TE 285K - traded in '12
1984 300SD 186K - Sold in 08
1978 300SD 330K - Died in 05