Is the 2021 Mercedes-Benz S-Class reliable?

The 2021 Mercedes-Benz S-Class scores 78/100 (C+) on OwnerKeep's reliability index, which places it in the moderate risk category. See the full report for the specific strengths and failure points.

What are the common problems with the 2021 Mercedes-Benz S-Class?

See the Common Issues section above for the top failure areas reported by real owners, with typical mileage ranges where problems start showing up.

How much does it cost to maintain a 2021 Mercedes-Benz S-Class?

Expected maintenance costs depend heavily on age, mileage and how well the vehicle was kept up. Run the full report for a year-by-year cost outlook.

What should I check before buying a 2021 Mercedes-Benz S-Class?

Focus on the top risk areas flagged in this report, review service history, and verify the vehicle is not inside one of the mileage danger zones listed above.

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Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

2021 Mercedes-Benz S-Class Reliability ReportC+ grade · moderate risk · system-by-system breakdown

78/ 100

KeepScore

MODERATE RISK

Grade: C+

A technological marvel offering unparalleled luxury, but its bleeding-edge systems present a significant financial commitment for long-term reliability.

Full system breakdown + what I would do

Quick Facts · 2021 Mercedes-Benz S-Class

The system most likely to surface first: mbux / infotainment system (moderate severity).
No active NHTSA safety recalls on record — a clean recall slate for the 2021 model year.
Scores 5 points below the strongest nearby year — the 2020 Mercedes-Benz S-Class earns a 83.

Is the 2021 Mercedes-Benz S-Class Worth Buying?

The 2021 Mercedes-Benz S-Class, while a paragon of luxury and technological advancement, carries a moderate risk profile for long-term ownership. Its cutting-edge features and complex systems provide an unparalleled experience but demand meticulous maintenance and a substantial budget for potential repairs. This isn't a vehicle you can neglect; it's a testament to engineering that requires ongoing commitment to truly shine.

Biggest Strengths

Unmatched build quality and luxury materials
Exceptional ride comfort and refinement
Robust powertrain fundamentals (engine/transmission)

What Tends to Fail First on the 2021 Mercedes-Benz S-Class

The systems that break first on the 2021 Mercedes-Benz S-Class. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

MBUX / Infotainment Systemmoderate

Air Suspension (Airmatic/E-Active Body Control)major

Advanced Driver-Assistance Systems (ADAS)moderate

Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

2021 Mercedes-Benz S-Class Recall History

No active NHTSA safety recalls on file for the 2021 Mercedes-Benz S-Class. Always verify with your VIN atnhtsa.gov.

What breaks on the 2021 Mercedes-Benz S-Class?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Other Mercedes-Benz S-Class Years to Consider

Compare KeepScores across nearby years of the Mercedes-Benz S-Class. Click any year for its full report.

All Mercedes-Benz S-Class years ranked →Mercedes-Benz S-Class years to avoid →Mercedes-Benz S-Class common problems →

2021 Mercedes-Benz S-Class Alternatives

Similar class, similar year range — ranked by KeepScore.

2019 ChryslerPacifica

82/100

Relevant Products for Your 2021 Mercedes-Benz S-Class

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Frequently Asked Questions

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