Is the 2009 Mercedes-Benz Slk reliable?

The 2009 Mercedes-Benz Slk 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 Slk?

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 Slk?

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 Slk?

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 Slk Reliability ReportCommon Problems, Repair Costs & Expert Verdict

78/ 100

KeepScore

MODERATE RISK

Grade: C+

A stylish, engaging roadster with solid foundations, but expect premium repair bills when its complex systems inevitably demand attention.

Full system breakdown + what I would do

Quick Facts · 2009 Mercedes-Benz Slk

No active NHTSA safety recalls on record — a clean recall slate for the 2009 model year.
Outscores the 2010 Mercedes-Benz Slk by 6 points — one of the stronger nearby years to consider.
The system most likely to surface first: retractable hardtop mechanism (major severity).

Should You Buy the 2009 Mercedes-Benz Slk?

The 2009 Mercedes-Benz SLK offers a compelling blend of luxury, style, and sporty performance, making it an appealing used roadster. While it benefits from the R171 generation's refinement, owners must be prepared for the higher cost of parts and labor associated with a complex German luxury vehicle, particularly concerning its sophisticated retractable hardtop and specific engine/transmission nuances.

Biggest Strengths

Robust chassis and body structure
Engines, when properly maintained, are generally durable
High-quality interior materials (for its class)

Top Risk Areas

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

Retractable Hardtop Mechanismmajor

7G-Tronic (722.9) Transmissionmajor

Engine Oil Leaks (M272/M273)moderate

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

NHTSA Recalls

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

What breaks on the 2009 Mercedes-Benz Slk?

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

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Mercedes-Benz Slk by Year

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

All Mercedes-Benz Slk years ranked →Mercedes-Benz Slk years to avoid →Mercedes-Benz Slk common problems →

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Frequently Asked Questions

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