I have an 88 s4 t2 which had power doors originally, however, the passenger side door got damaged in a minor accident and was replaced with another door which was not power. I am planning on getting another power door for it and have found one which is the correct color and with a working window motor. The only problem is that it is from a '91 s5 t2. My question is if that door will fit directly into my s4 and will the electrical wiring work with it also? Thanks for any help.

 

The side molding is different between S4 and S5. I'm not sure that you can swap the moldings. The wiring should be the same, or close enough that you can easily adapt it.