The Mercedes-Benz S-Class (W223) is the automotive benchmark for luxury sedan ride quality and refinement. Its tires carry MO (Mercedes-Original) approval codes, meaning they were co-engineered with Mercedes-Benz for the specific suspension tuning, noise isolation targets, and high-speed behavior of the S-Class. Replacing them requires matching that standard.
Stock Tire Sizes by Trim
Mercedes S450 4MATIC standard: 245/45R19 on base 19-inch wheels
Mercedes S580 and AMG Line package: 245/40R20 on 20-inch wheels
Mercedes S-Class with AMG Line+ or larger wheel option: 255/35R21 or 265/30R21 on 21-inch wheels
The W223 S-Class uses a uniform non-staggered fitment across most configurations — same tire front and rear, enabling regular cross-rotation every 5,000 to 7,000 miles.
Always verify on the driver-side door jamb sticker. AMG Line packages and optional wheel upgrades can change the size specification from what was standard for your trim.
Top Tire Picks for the Mercedes S-Class
Continental PremiumContact 7 (MO): the standard OEM tire on many W223 S-Class configurations. The MO approval means it was tuned specifically for Mercedes noise targets, ride compliance, and high-speed stability. Exceptional wet grip, outstanding rolling resistance, and the quietest highway behavior in its class.
Michelin Pilot Sport 4S (MO): the upgrade choice for S-Class owners who value dynamic performance alongside luxury. Available with MO approval. Outstanding wet and dry grip with the precision steering feel the PS4S is known for — enhances the S-Class driving experience without compromising ride quality.
Pirelli P Zero PZ4 (MO): alternative OEM-spec tire available with Mercedes approval. Excellent high-speed stability and a refined character that suits the S-Class grand touring mission. Available in most S-Class sizes.
Bridgestone Turanza T005: the best choice for pure comfort and noise minimization. Lower rolling resistance and exceptional NVH suppression make this the quietest option in S-Class sizes. Recommended for owners who use the S-Class primarily as a long-distance touring car.
Michelin CrossClimate 2: for S-Class owners who want all-weather capability. Carries the three-peak mountain snowflake rating while maintaining near-summer-tire dry performance. Available in 245/45R19 and 245/40R20 sizes.
MO and MO-E Approval Codes
MO means Mercedes-Original — the tire was engineered and tested to Mercedes-Benz performance and safety specifications. MO tires for the standard S-Class optimize for comfort, quiet, and wet grip.
MO-E is a separate designation for Mercedes electric vehicles (EQS, EQE) — these tires include acoustic foam and lower rolling resistance for EV range optimization. Do not confuse MO and MO-E when replacing.
MO1 is the AMG-specific code, used for AMG 63 and AMG 73 performance models with the highest performance demands. If your S-Class is an AMG, verify whether your OEM tires carry MO or MO1.
Frequently asked
What tire size does the Mercedes S-Class use?
It depends on trim and wheel size. The S450 on 19-inch wheels uses 245/45R19. The S580 on 20-inch uses 245/40R20. AMG Line packages with 21-inch wheels may use 255/35R21 or larger. Always check the driver-side door jamb sticker — W223 trim variations are significant.
Do I need MO-approved tires for my Mercedes S-Class?
MO approval is recommended but not legally required. The S-Class suspension was developed alongside MO tires, and they are tuned for the specific NVH targets of the vehicle. Running a non-MO tire of equivalent quality will perform well. For the best match to the original ride and noise character, MO-approved tires are worth seeking out.
Can I put all-season tires on a Mercedes S-Class?
Yes. The Michelin CrossClimate 2 and Continental AllSeasonContact are both available in S-Class sizes and maintain strong luxury-tier performance. For most of the southeastern United States including West Georgia, a quality all-season is appropriate year-round. If you regularly encounter cold temperatures or snow, the CrossClimate 2 provides genuinely impressive winter traction.
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Last updated 2026-06-27. General guidance only — confirm specifics with a local shop for your exact vehicle.