Is the 2004 Mercedes-Benz Slk reliable?

The 2004 Mercedes-Benz Slk scores 75/100 (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 2004 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 2004 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 2004 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

2004 Mercedes-Benz Slk Reliability ReportC grade · moderate risk · system-by-system breakdown

75/ 100

KeepScore

MODERATE RISK

Grade: C

A stylish roadster with a solid heart, but its complex roof and finicky electronics demand a cautious and informed approach.

Full system breakdown + what I would do

Quick Facts · 2004 Mercedes-Benz Slk

The system most likely to surface first: vario-roof system (major severity).
No active NHTSA safety recalls on record — a clean recall slate for the 2004 model year.
Scores 3 points below the strongest nearby year — the 2006 Mercedes-Benz Slk earns a 78.

Is the 2004 Mercedes-Benz Slk Worth Buying?

The 2004 Mercedes-Benz SLK offers a compelling blend of style and sportiness, but it comes with a moderate risk profile due to its complex retractable hardtop and specific electrical vulnerabilities. While core mechanicals are generally solid, diligent maintenance and a thorough pre-purchase inspection are critical to avoid common, costly repairs, making it a purchase for the enthusiast prepared for potential specialized upkeep.

Biggest Strengths

Robust M112 V6 engine (SLK320)
Strong chassis and handling dynamics
Generally high build quality of core components

What Tends to Fail First on the 2004 Mercedes-Benz Slk

The systems that break first on the 2004 Mercedes-Benz Slk. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Vario-Roof Systemmajor

Electrical Systemmoderate

Automatic Transmissionmajor

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

2004 Mercedes-Benz Slk Recall History

No active NHTSA safety recalls on file for the 2004 Mercedes-Benz Slk. Always verify with your VIN atnhtsa.gov.

What breaks on the 2004 Mercedes-Benz Slk?

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

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Other Mercedes-Benz Slk Years to Consider

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 →

2004 Mercedes-Benz Slk Alternatives

Similar class, similar year range — ranked by KeepScore.

2002 ToyotaLand Cruiser

92/100

2002 ChevroletCorvette

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Frequently Asked Questions

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