Is the 2009 Mercedes-Benz C-Class reliable?

The 2009 Mercedes-Benz C-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 2009 Mercedes-Benz C-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 2009 Mercedes-Benz C-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 2009 Mercedes-Benz C-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

2009 Mercedes-Benz C-Class Reliability ReportC+ grade · moderate risk · system-by-system breakdown

78/ 100

KeepScore

MODERATE RISK

Grade: C+

A spirited luxury sedan with known, albeit manageable, mechanical vulnerabilities that require proactive attention and a robust repair fund.

Full system breakdown + what I would do

Quick Facts · 2009 Mercedes-Benz C-Class

The system most likely to surface first: engine (m272 v6) (major severity).
No active NHTSA safety recalls on record — a clean recall slate for the 2009 model year.
Outscores the 2007 Mercedes-Benz C-Class by 10 points — one of the stronger nearby years to consider.

Is the 2009 Mercedes-Benz C-Class Worth Buying?

The 2009 Mercedes-Benz C-Class offers an appealing blend of luxury and driving dynamics, but don't let its badge fool you into thinking maintenance will be cheap or optional. While generally well-built, specific areas like the M272 V6 engine's intake manifold and the 7G-Tronic transmission's valve body can lead to significant repair bills. This vehicle demands diligent maintenance and a healthy repair budget to remain a reliable daily driver.

Biggest Strengths

Solid structural integrity and safety features
Engaging driving dynamics for its class
High-quality interior materials (excluding some plastics)

What Tends to Fail First on the 2009 Mercedes-Benz C-Class

The systems that break first on the 2009 Mercedes-Benz C-Class. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Engine (M272 V6)major

Transmission (7G-Tronic 722.9)major

Electrical/Electronicsmoderate

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

2009 Mercedes-Benz C-Class Recall History

No active NHTSA safety recalls on file for the 2009 Mercedes-Benz C-Class. Always verify with your VIN atnhtsa.gov.

What breaks on the 2009 Mercedes-Benz C-Class?

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

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Other Mercedes-Benz C-Class Years to Consider

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

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

2009 Mercedes-Benz C-Class Alternatives

Similar class, similar year range — ranked by KeepScore.

2007 ToyotaLand Cruiser

2007 ChevroletCorvette

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Frequently Asked Questions

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