SL/R231: 2013 SL550 Wheel size question



We had a bit of snow here in the deep south recently and while it wasn't expected to stick, it did. By the time I left the office, it was pretty narly and I curbed the wheels and tires pretty badly. Sure, I can get them repaired and new tires, but I've never really been in love with the stock rims.
I have a brand-new set of wheels and tires (that I really like) that came on another car. They are 5x108 but I can always use adapters for 5x112. I'm really not sure about the actual wheel sizes but I don't think they are staggered, they're probably 8.5's. They currently have brand new Conti 255/35ZR20's on them.
Question is, could I actually use these on the SL or is this just folly? As always, your opinions would be appreciated. Cheers.









