still need your help
https://mbworld.org/forums/wheels-ti...-they-fit.html
Front 8 x 18 ET 45
Rear: 9 x 18 ET 54
The wheels in that link are listed as:
Front: 8 x 17 ET 37
Rear: 8.5 x 17 ET 30
So first question is will the 17" wheels clear the brakes on your car? I know C350's need a minimum of 17" wheels so not sure about C63's or C63 w/ Perf Pack.
Second is wheel size and will the fit.
So comparison of factory 18" fronts and these 8 x 17" fronts looks like the inside edge of the wheel will be tucked into the car an additional .32"
Comparison of the 18" rears and the listed 8.5 x 17" looks like the inside edge of the wheel will be tucked in an additional .45"
I don't have a C63, but I know some people have been fitting larger wheels to their cars. So maybe you have an extra ~.5" between the factory rear wheels and suspension / shocks in the rear. And if these to fit I will say they will look very awkward. because essentially the rear wheel outside face will be tucked into the wheel well ~1"


