Ok.. So I have some ssr (C Class White rims [17"..?]) sitting in my backyard and thought if I could make a swap with my current ones (Stock [15"?] from what i've heard)
I was wondering if I would need to change the body work or replace anything to fit them on?
 
Sorry i'm new with wheels etc..

depending on what width, pcd and offset they are they may or may not fit
 
have a look inside the wheel rim for a sticker and post up what it says
hopefylly they will suit your car.
alternatively take a pic of the sticker and post it up here
cheers

Width and offset?
 
depends on your offset whether they'll foul on your struts or not. anything more than, say, +35 and i wouldn't bother, and if it's too far out, it'll foul on your guards when you turn, and scrub over bumps if you've got too much travel...
 
there's a fair bit to take into account when looking at what sort of rims...
 
best bet would be to dummy fit them to your car. if they don't foul on anything, you should be good as long as you have the right size tyres (40 profile for 17's is ideal)

+1 for dummy fit. You can fit pretty aggressive 17's so success is likely.

Here is the sticker and a pic of the rim/s

I also have to mention that the bodywork is all stock as well..

18X8.5 +32?

shouldn't have a problem with them
 
I'm running 16X8, 16X9's with bigger offset, but i rub my guards a tiny bit because of my massive tyres
 
give 'em a fit, you should have no trouble though, but if you're after tyres for them, make sure they're not too big :D

Are all four wheels the same width (have same numbers on the stickers?)
 
If so The rear (IMO) may look a bit out of proportion to the front.
 
If that size is the same all round, you will be very close to the front suspension, and if you are running coilovers I am pretty sure a spacer will be required.

Yes all the stickers show the same thing. I will need new tyres for them.. So im guessing the rear ones will stick out more if not a lot more if they do fit on?

Are all four of them 18x8.5 +32?
That size on the front will poke out a little I think. Maybe some neg camber will make em fit???