Is the 2009 Mercedes-Benz Gl-Class reliable?

The 2009 Mercedes-Benz Gl-Class scores 65/100 (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 Gl-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 Gl-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 Gl-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 Gl-Class Reliability ReportCommon Problems, Repair Costs & Expert Verdict

65/ 100

KeepScore

MODERATE RISK

Grade: C

This full-size luxury SUV delivers comfort and prestige, but its high-maintenance nature and propensity for expensive system failures make it a high-stakes ownership proposition.

Full system breakdown + what I would do

Quick Facts · 2009 Mercedes-Benz Gl-Class

No active NHTSA safety recalls on record — a clean recall slate for the 2009 model year.
Outscores the 2008 Mercedes-Benz Gl-Class by 10 points — one of the stronger nearby years to consider.
The system most likely to surface first: airmatic air suspension (major severity).

Should You Buy the 2009 Mercedes-Benz Gl-Class?

The 2009 Mercedes-Benz GL-Class offers substantial luxury and space, making it an attractive used family hauler. However, it's a vehicle that demands a significant commitment to maintenance and a robust repair fund, as its complex systems are prone to expensive failures, especially with the air suspension and diesel engine. Proceed with caution, as deferred maintenance can quickly lead to financially crippling repairs.

Biggest Strengths

Luxurious, spacious cabin with comfortable seating
Robust V8 engine performance (GL450/550)
Strong safety ratings and AWD capability

Top Risk Areas

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

Airmatic Air Suspensionmajor

OM642 Diesel Engine (Oil Cooler & Swirl Flaps)major

M273 V8 Engine (Intake Manifold & Cam Magnets)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 Gl-Class. Always verify with your VIN atnhtsa.gov.

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

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

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Mercedes-Benz Gl-Class by Year

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

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

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Frequently Asked Questions

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