The Vendor claims there will be no rubbing issues whatsoever, so I did order the wheels and tires.18's are better choice for the NY streets... 8.5's are OK for the rear but not sure about the fronts since you also increased the width +10 mm. Remember the front tire will tilt at full turns and needs to clear the shock/struts ... also if the car is bouncing around it needs clearance too, if you make it too close, it will rub and shave/damage the inside sidewalls of the tires (no warranty here).
Make the vendor/ dealer promise you that there will be no fitment/clearance issues otherwise you are entitled to a full refund.
Oh yes, the 4-matic car must have four identical rim/tires ... cannot be staggered.
Please post here what you finally get so we can close this thread.
Goodluck ! :thumbsup: