CityBoy

*** EDIT ***
I got a different set of wheels for GLS. All set. The set below is up for sale in Marketplace.

I have wheels from S550 which I got directly from Germany (100% OEM). I think they will fit 2021 GLS 450 and will look great.

front A2224014000
8.5Jx20H2 ET38

rear A2224014100
9.5Jx20H2 ET38

I am positive I can make it work (winter setup only) with

255/55/R20 front
275/50/R20 rear

Can someone confirm?

Another option is to sell this set and get a stock 20" or 21" set.