Steve, I replaced mine at some point and all I remember is that you have to run the mirror downward and possibly inward some until you can reach the retaining wire. The wire unhooks and allows the flat plastic piece to come off of the motor.

I think I used a flat bladed screwdriver to unhook the wire.

Sorry if this is vague. As I remember, it wasn't too difficult.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250