These are your wheels :
Front alloy wheels: 18x8.5" ET35
Wheel part number: MER B66474060
Additional alloy part number: A2304010402
Rear alloy wheels: 18x9.5" ET40
Wheel part number: MER B66474061
Additional alloy part number: A2304010502
In MY opinion, these will fit a 220 s class no problem, but will sit closer to the arches than the original wheels.
My wheels are the same size, but ET44 and there is still a fair bit of space for a more aggressive offset.