What size tires does the 2018 Mercedes-Benz GLS63 AMG Base 4-Matic take?
The factory tire size for the 2018 Mercedes-Benz GLS63 AMG Base 4-Matic is 295/40R21.
This trim is also listed with 285/40R22. Check which one your vehicle has.
Factory tire sizes and ratings
Wheels
Size
Load index
Speed rating
All wheels
295/40R21
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—
All wheels
285/40R22
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Confirm the size printed on the sidewall of your current tire or on the tire placard in the driver's door jamb before you buy. Replacement tires should meet or exceed the vehicle's load index and speed rating.