i put my driver-side wheel into a curb and bent and broke several parts. Can i put S4 parts onto my S5?

 

Yes, read the stickied threads on the top of the page and do a search. Any 5 lug FC wheel will fit, and all the suspension parts are interchangable (although not completely identical), if you're getting new control arms, get S4 ones, they've got replacable outer ball joints.

 

It depends on what parts you're talking about. Some fit, others take some work to adapt, and some just won't work at all. I don't know any specifics, though.

 

Right now the only serious difference that I can think of would be the swaybar/endlinks. I forgot about that before.

 

I think that as you and I get started on this, we should post pictures here of before and after.

 

sway bars are different, end links are different, control arms are different. all are slight differences, but it should be replaced with parts from the same series.