Hi guys, my C55 calls for 225/40/18 all around (as per MB factory spec).

However, I have a near brand new set of 225/45/18's sitting in my garage from a car I sold last year.

Would I be able to run these or is that too significant a size change?

I know tirerack mentions 225/40/18 as the proper tire size as that's what the factory calls for.

Thanks!