I have staggered 19s on my Cab 4-Matic (no Sport Pkg). I'd like to get 18s for winter tires. I haven't decided whether to stay with the stagger sizes or go "squared up". Where do I find dependable M-B wheel data with the correct offsets?

Bump.

Maybe this will be a good starting point?
https://www.wheel-size.com/size/merc...lass-amg/2018/

If you just go to tirerack.com and put in what you have now you can reference the OEM fitment options they have. Those might have the information you need for the bolt pattern & offset.