2021 Mercedes-Benz E-Class Reliability ReportKeepScore 82/100 · top failure points · buy or avoid
Quick Facts · 2021 Mercedes-Benz E-Class
- Scores 6 points below the strongest nearby year — the 2023 Mercedes-Benz E-Class earns a 88.
- The system most likely to surface first: electrical & infotainment (moderate severity).
- No active NHTSA safety recalls on record — a clean recall slate for the 2021 model year.
2021 Mercedes-Benz E-Class: Buy or Avoid?
The 2021 Mercedes-Benz E-Class represents a pinnacle of luxury and technology, making it a compelling used purchase for those seeking refinement and prestige. While generally reliable for its segment, owners must be prepared for the inevitable higher maintenance costs and potential for expensive repairs associated with its advanced systems, especially once the factory warranty expires. It's a smart choice for discerning buyers who understand the demands of premium ownership.
The 2021 E-Class is an undeniably desirable luxury sedan, offering a superb blend of comfort, performance, and advanced technology. While generally reliable for its segment, its inherent complexity demands a responsible owner prepared for premium maintenance and potential high-cost repairs, especially once out of wa…
Best Model Years
2021-Present (W213 facelift, particularly with the M256 I6 engine)
Years to Avoid
Earlier W213 pre-facelift models (2017-2019) with the M274 2.0L I4 engine, as they had more reported piston/ring issues.
Biggest Strengths
- Robust powertrain (especially M256 I6)
- Exceptional interior quality and comfort
- Advanced safety and driver-assist technology
2021 Mercedes-Benz E-Class — Known Trouble Spots
The systems that tend to fail first on the 2021 Mercedes-Benz E-Class, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
The sophisticated MBUX infotainment system can experience software freezes, random reboots, or glitches. Various sensors (parking, blind spot) can fail, leading to dashboard warnings. Parasitic battery drain issues, though uncommon, can…
For models equipped with AIRMATIC, air spring bags can develop leaks, leading to sagging, especially overnight. The air compressor can also fail from overwork. These issues are costly to diagnose and repair, significantly impacting ride…
While the core engines are strong, specific sensors (e.g., crankshaft position, NOx sensors) or auxiliary components (e.g., thermostat housing, oil filter housing leaks) can fail, triggering check engine lights and requiring specialized…
2021 Mercedes-Benz E-Class Mileage Danger Zones
The mileage windows when the 2021 Mercedes-Benz E-Class most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the E-Class is likely still under its factory warranty, with most components performing optimally. Any issues are typically minor electrical glitches or early brake wear, usually covered by warranty.
Maintenance Zone
This mileage often coincides with major factory service intervals (Service B), including spark plugs and potentially transmission fluid. The original tires may be nearing replacement, and some early signs of wear on suspension components…
Elevated Risk Zone
Beyond the typical warranty period, this mileage zone sees an increased likelihood of component failures due to wear and tear. AIRMATIC suspension issues become more prevalent, and various sensors or bushings may require attention, leadi…
High Risk Zone
At this mileage, major component wear is expected. Owners should anticipate the potential for significant repairs beyond routine maintenance, including major powertrain components, full suspension overhauls, and complex electrical system…
2021 Mercedes-Benz E-Class Ownership Cost Outlook
What it typically costs to keep the 2021 Mercedes-Benz E-Class on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$600-900
Moderate Repairs
$800-2,000 occasionally (sensors, brake jobs, minor leaks)
How Long Does the 2021 Mercedes-Benz E-Class Last?
Seek a well-maintained example with under 50,000 miles to maximize the remaining warranty period and minimize immediate high-cost repair risks, allowing you to enjoy the car before major wear components or advanced systems begin to fail.
What 2021 Mercedes-Benz E-Class Owners Actually Say
What Owners Love
- Unmatched interior luxury, design, and high-quality materials.
- Smooth, powerful, and refined engines, especially the E450's I6.
- Cutting-edge technology, particularly the MBUX infotainment and driver-assist features.
- Exceptional ride comfort and serene cabin, even on long journeys.
Common Frustrations
- MBUX infotainment system can be buggy, slow, or frustrating to use at times.
- High costs for routine maintenance, parts, and specialized labor.
- Rapid initial depreciation can be a concern for original owners.
- Potential for expensive repairs, particularly related to air suspension or complex electronics.
Who Should Buy the 2021 Mercedes-Benz E-Class?
Best For
- Executives and professionals seeking a prestigious, comfortable daily driver.
- Tech-savvy luxury buyers who appreciate advanced infotainment and safety features.
- Drivers prioritizing ride comfort, quietness, and a refined driving experience.
Not Ideal For
- Budget-conscious buyers looking for the lowest possible running costs.
- DIY mechanics without specialized Mercedes-Benz diagnostic tools and experience.
How the 2021 Mercedes-Benz E-Class Compares to Rivals
The E-Class offers a more sophisticated driving experience, luxurious interior, and advanced technology than many rivals. However, this complexity often translates directly into higher maintenance and repair costs compared to more mainstream or less technology-intensive luxury…
More Reliable Than
- Older generation BMW 5 Series (F10/F30 chassis)
- Some Cadillac CTS/CT5 models (less refined powertrains)
- Infiniti Q70 (outdated tech, less sophisticated ride)
Comparable To
- Current generation Audi A6 (similar tech, complexity, and ownership costs)
- Lexus GS (if still available; renowned for reliability but less technologically advanced)
- Genesis G80 (newer competitor, strong value, but long-term data still developing)
Safety Recalls on the 2021 Mercedes-Benz E-Class
No active NHTSA safety recalls on file for the 2021 Mercedes-Benz E-Class. Always verify with your VIN atnhtsa.gov.
What breaks on the 2021 Mercedes-Benz E-Class?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Mercedes-Benz E-Class — Year-by-Year Comparison
Compare KeepScores across nearby years of the Mercedes-Benz E-Class. Click any year for its full report.
Competing 2021s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2021 Mercedes-Benz E-Class
Parts and accessories matched to your 2021 Mercedes-Benz E-Class
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Frequently Asked Questions
Just bought a 2021 Mercedes-Benz E-Class? Keep it that way.
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