2017 Mercedes-Benz Sl-Class Reliability ReportCommon Problems, Repair Costs & Expert Verdict
Quick Facts · 2017 Mercedes-Benz Sl-Class
- No active NHTSA safety recalls on record — a clean recall slate for the 2017 model year.
- Outscores the 2015 Mercedes-Benz Sl-Class 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 2017 Mercedes-Benz Sl-Class?
The 2017 Mercedes-Benz SL-Class offers an exquisite blend of performance and luxury, making it a compelling choice for those seeking a premium roadster. While the core mechanicals are generally robust, its sophisticated engineering, particularly the retractable hardtop and adaptive suspension systems, presents a moderate risk for high-cost repairs as it ages. Be prepared for significantly higher ownership costs compared to mainstream vehicles.
The 2017 Mercedes-Benz SL-Class is a magnificent car, but its luxury and performance come with a significant asterisk regarding long-term ownership costs. If you have the financial reserves for potentially major repairs and appreciate its grand touring prowess, it's an enjoyable vehicle. However, it's not a car for…
Best Model Years
2017-2020 (R231 facelift models, post-M276/M278 early issues)
Years to Avoid
Earlier R231 models (2013-2015) may have more prevalent engine and transmission software quirks.
Biggest Strengths
- Robust engine and transmission (if properly maintained)
- Exceptional build quality and premium interior materials
- High level of safety and driving assistance features
Top Risk Areas
The systems that tend to fail first on the 2017 Mercedes-Benz Sl-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 complex array of hydraulic cylinders, lines, pumps, and sensors that operate the convertible roof can fail. Common issues include hydraulic fluid leaks, motor failures, or sensor malfunctions preventing full operation.
Both systems are highly advanced but prone to leaks in air springs or struts, compressor failure, valve block issues, or hydraulic pump/accumulator failures for ABC. Repairs are notoriously expensive.
The sophisticated COMAND infotainment unit can experience glitches, freezing, or display issues. Various sensors (e.g., parking assist, blind spot monitor) can fail, leading to dashboard warnings or system inoperability. Battery drain ca…
2017 Mercedes-Benz Sl-Class Mileage Danger Zones
The mileage windows when the 2017 Mercedes-Benz Sl-Class most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the car is still relatively young, likely within its original warranty period. Most issues encountered will be minor electronic glitches or normal wear items like tires and brakes.
Maintenance Zone
Beyond the typical warranty period, this is where major scheduled maintenance becomes crucial. Issues with the convertible top mechanism or early signs of suspension component wear might begin to surface, requiring attention.
Elevated Risk Zone
This mileage range often sees more significant component failures, especially for the complex suspension systems and larger engine components. Proactive maintenance and a thorough inspection are paramount.
High Risk Zone
Beyond 100,000 miles, every repair can be costly. Expect age-related failures across all major systems, including potential engine component wear, transmission issues, and multiple suspension component replacements. A significant slush f…
2017 Mercedes-Benz Sl-Class Ownership Cost Outlook
What it typically costs to keep the 2017 Mercedes-Benz Sl-Class on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$800-1,500 (excluding major repairs)
Moderate Repairs
$1,000-3,000 occasionally (e.g., brake overhaul, sensor replacement, minor suspension work)
How Long Does the 2017 Mercedes-Benz Sl-Class Last?
Focus on models under 60,000 miles if possible, as this buys you more time before the most expensive suspension and convertible top components are likely to fail. Any SL over 100,000 miles should be considered a project car with significant potential costs.
What 2017 Mercedes-Benz Sl-Class Owners Actually Say
What Owners Love
- Exquisite ride comfort and composed handling for a grand tourer.
- Potent and smooth engines deliver strong performance.
- Iconic and timeless styling that commands attention.
- Premium, well-appointed interior with high-quality materials.
Common Frustrations
- Extremely high cost of specialized parts and labor for repairs.
- Complex convertible top mechanism can be a source of frustration and expensive fixes.
- Infotainment system (COMAND) can feel dated compared to newer Mercedes models.
- Significant depreciation makes it a poor financial investment, especially new.
Who Should Buy the 2017 Mercedes-Benz Sl-Class?
Best For
- Enthusiasts who appreciate luxury, performance, and convertible motoring.
- Buyers with a substantial budget set aside for ongoing maintenance and potential repairs.
- Individuals seeking a comfortable and stylish grand tourer for weekend drives or road trips.
Not Ideal For
- Budget-conscious buyers looking for low operating costs.
- Anyone who will defer maintenance or put off minor repairs.
How the 2017 Mercedes-Benz Sl-Class Compares to Rivals
The SL-Class generally offers a more luxurious and comfortable grand-touring experience than the sportier F-Type and 911, with comparable reliability to BMW but falls short of the legendary durability of a Lexus LC.
More Reliable Than
- Jaguar F-Type Convertible
- Maserati GranTurismo Convertible
Comparable To
- BMW 6 Series Convertible (F12)
- Lexus LC Convertible
NHTSA Recalls
No active NHTSA safety recalls on file for the 2017 Mercedes-Benz Sl-Class. Always verify with your VIN atnhtsa.gov.
What breaks on the 2017 Mercedes-Benz Sl-Class?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Mercedes-Benz Sl-Class by Year
Compare KeepScores across nearby years of the Mercedes-Benz Sl-Class. Click any year for its full report.
If You're Considering This, Also Look At
Similar class, similar year range — ranked by KeepScore.
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Frequently Asked Questions
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