The mechanism has to come out in two parts in order to remove it without a lot of wrestling and swearing. The motor is held in with three bolts, they face the outside of the car, and are on the far side of the mechanism, you can't see them, you will have to feel for them. They should be about a 10mm head.
If I remember, the other trick is that the mechanism has to be in the down position in order to clear everything on the way out.
I don't remember it being too bad if you have these two parts licked. -Andy

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andy t
'78 300d
'95 volvo 850, wagon
'86 300sdl - engine out, maybe I'll have it rolling by June

whole bunch o' bicycles