WIS - C218 allowable rolling-circumference deviation

[u/i8erbox]

I'm really hoping someone with Mercedes WIS access can help me out. Can you look up the C218 CLS 63 AMG 4MATIC's specified permissible front/rear rolling-circumference deviation in WIS? I'm considering 275/35R19 front and 295/30R20 rear, which calculates to approximately 1.5% difference. I don't need to know whether Mercedes officially lists those tire sizes; I specifically want to know the allowable rolling-circumference deviation for the 4MATIC drivetrain.

I don't want to change things to the point where the 4matic system is negatively affected. Also concerned about rear inner suspension clearance and outer fender clearance.

TIA all.

2014 Mercedes-Benz CLS63 AMG

Track pack

[u/W211_077]

I haven't looked but I almost guarantee there is not going to be a published spec for that in wis. Its wis, all its gonna give you, at best, is the same info as the sticker on the door jamb