2017 Mercedes-Benz Gls Reliability ReportCommon Problems, Repair Costs & Expert Verdict
Quick Facts · 2017 Mercedes-Benz Gls
- No active NHTSA safety recalls on record — a clean recall slate for the 2017 model year.
- Outscores the 2018 Mercedes-Benz Gls by 6 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 2017 Mercedes-Benz Gls?
The 2017 Mercedes-Benz GLS offers a compelling blend of luxury, space, and power, making it an attractive used family hauler. While generally well-built, owners must prepare for significant maintenance costs, particularly concerning its complex air suspension and sophisticated electronics. This vehicle is a solid choice if you prioritize comfort and prestige but enter ownership with a robust reserve for inevitable, premium-priced repairs.
The 2017 Mercedes-Benz GLS is a fantastic luxury SUV when it's running perfectly, offering immense comfort and prestige. However, its complex systems and premium parts translate directly into high ownership costs. Purchase this vehicle only if you have a significant budget earmarked for maintenance and potential rep…
Best Model Years
2017-2019 (later years of the X166 generation benefited from refinements)
Years to Avoid
None explicitly for the X166 generation, but earlier 2013-2016 GL-Class (X166) models may have more pronounced early-production quirks, though a 2017 GLS is essentially a refreshed GL.
Biggest Strengths
- Exceptional ride comfort and interior luxury
- Robust powertrain options (especially V6)
- Advanced safety and driver-assistance features
Top Risk Areas
The systems that tend to fail first on the 2017 Mercedes-Benz Gls, 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 air springs and compressor are common failure points, leading to uneven ride height, a harsh ride, or complete collapse. Leaks in the air lines or deteriorating air bellows are typical.
Issues range from COMAND infotainment system glitches (freezing, reboots), various sensor failures (ABS, speed, NOx), to auxiliary battery drains and power liftgate motor malfunctions. Wiring harness issues are less common but costly.
Particularly on the GLS 550's M278 V8, oil cooler seal leaks and valve cover gasket leaks are known to occur. These can lead to oil consumption, burning oil smell, and potential damage if left unaddressed.
2017 Mercedes-Benz Gls Mileage Danger Zones
The mileage windows when the 2017 Mercedes-Benz Gls most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, the GLS is still relatively new. Most issues here would be minor electrical glitches, early tire/brake wear, or potentially some initial software updates for the infotainment system or transmission.
Maintenance Zone
This mileage often marks the expiration of original warranties and the onset of more significant preventative maintenance. Key fluids should be inspected or changed, and initial signs of air suspension wear may appear.
Elevated Risk Zone
Around this point, many original wear items and some larger components, especially the air suspension, are likely candidates for replacement. Engine oil leaks may also become noticeable, requiring attention.
High Risk Zone
At higher mileages, expect a comprehensive overhaul of suspension components. Engine issues like timing chain components (V8s) or major oil cooler leaks become more probable. This is where neglect of prior maintenance will lead to substa…
2017 Mercedes-Benz Gls Ownership Cost Outlook
What it typically costs to keep the 2017 Mercedes-Benz Gls on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$800-1,200
Moderate Repairs
$1,000-3,000 occasionally for common issues like air springs or sensor failures.
How Long Does the 2017 Mercedes-Benz Gls Last?
For best long-term reliability and value, target a GLS with a comprehensive service history, ideally under 70,000 miles, to minimize immediate major repair expenses like air suspension overhauls.
What 2017 Mercedes-Benz Gls Owners Actually Say
What Owners Love
- Exceptional ride comfort and serene cabin quietness on long trips.
- Powerful engine options providing effortless acceleration.
- Spacious and luxurious interior, even for third-row passengers.
- Impressive array of safety features and driver aids.
Common Frustrations
- Very high cost of ownership, especially for repairs.
- Persistent issues with the Airmatic suspension requiring costly fixes.
- Infotainment system can be clunky or glitchy, feeling dated compared to newer systems.
- Poor fuel economy, especially with the V8 engines.
Who Should Buy the 2017 Mercedes-Benz Gls?
Best For
- Families requiring luxurious 7-passenger capacity for long trips
- Luxury seekers who prioritize comfort and brand prestige over absolute lowest cost of ownership
- Buyers with a dedicated budget for premium vehicle maintenance and unexpected repairs
Not Ideal For
- Budget-conscious buyers seeking minimal running costs
- DIY mechanics (due to system complexity and specialized tools)
How the 2017 Mercedes-Benz Gls Compares to Rivals
The GLS offers a superior blend of luxury, comfort, and performance compared to many competitors, but generally falls short of Japanese rivals like Lexus/Toyota in terms of long-term mechanical simplicity and repair costs. It's on par with its German counterparts regarding com…
More Reliable Than
- Land Rover Discovery (L462)
- Cadillac Escalade (K2XX generation)
Comparable To
- BMW X5 (F15)
- Audi Q7 (4M generation)
NHTSA Recalls
No active NHTSA safety recalls on file for the 2017 Mercedes-Benz Gls. Always verify with your VIN atnhtsa.gov.
What breaks on the 2017 Mercedes-Benz Gls?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Mercedes-Benz Gls by Year
Compare KeepScores across nearby years of the Mercedes-Benz Gls. Click any year for its full report.
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Frequently Asked Questions
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