Mercedes GLS 2015-2019 SUV Review
Discover the luxury, power, and versatility of the Mercedes GLS from 2015 to 2019 in this comprehensive used SUV guide.
The Mercedes GLS from 2015 to 2019 stands out as a flagship full-size luxury SUV, blending opulent comfort, expansive seating for seven, and robust performance suitable for both urban drives and rugged adventures. Originally launched as the GL-Class and rebadged as GLS in 2015, this model refreshed its styling, suspension, and tech to appeal to buyers prioritizing space and refinement in a used vehicle market.
Design and Exterior Highlights
The GLS boasts commanding road presence with its massive dimensions—over five meters long and nearly two meters wide—making it ideal for families or those needing serious towing capacity up to 3,500kg. Updated bumpers and LED lighting in the 2015 facelift gave it a more aggressive front fascia, while 20- or 21-inch alloy wheels enhanced its premium stance. Its boxy shape maximizes interior volume without compromising aerodynamics, contributing to a quiet cabin even at highway speeds.
- Key exterior features: Adaptive LED headlights, power-folding mirrors with memory, and optional panoramic sunroof.
- Robust build with high-strength steel for safety.
- Off-road ready with underbody protection and adjustable air suspension.
Interior Comfort and Practicality
Step inside, and the GLS envelops occupants in leather-trimmed luxury across three rows. The front seats offer heating, ventilation, and massage functions on higher trims, while second-row captain’s chairs provide ample legroom. The third row, though best for children, folds flat into a 2,400-liter boot, expandable from 260 liters with all seats up. Materials feel plush, but the COMAND infotainment—complete with a rotary controller and 8-inch screen—shows its age compared to touch-heavy rivals.
| Seating Configuration | Boot Space (liters) | Legroom (mm, row) |
|---|---|---|
| 7 seats up | 260 | Front: 1,040 | Rear: 1,024 |
| 5 seats (3rd folded) | 1,550 | N/A |
| 2 seats (all folded) | 2,400 | N/A |
Climate control for four zones, ambient lighting, and nappa leather options elevate the experience, though some plastics feel less premium than in newer competitors.
Engine Options and Performance
A diverse lineup powers the GLS, catering to efficiency seekers and speed enthusiasts. Diesel variants like the GLS 350d (258hp, 7.8s 0-62mph) deliver smooth torque for long hauls, paired with a nine-speed automatic that’s responsive in traffic. Petrol choices include the V6 GLS 400 (333hp) and the thunderous GLS 63 AMG with a 5.5-liter twin-turbo V8 (585hp, 4.6s 0-62mph)—rivaling sports cars despite its 2.5-tonne weight.
- Diesel efficiency: Up to 44mpg on motorways with the 350d.
- AMG firepower: Top speed limited to 155mph, with adaptive damping for track-like handling.
- All models feature 4MATIC all-wheel drive for superior traction.
The air suspension adjusts ride height for off-roading, raising 100mm for rough paths or lowering for garages, ensuring a plush highway cruise absorbing bumps effortlessly.
Driving Dynamics and Handling
Despite its bulk, the GLS drives like a large sedan thanks to light steering, precise nine-speed shifts, and optional 360-degree cameras for parking. On-road, multi-glazed glass and insulation hush wind noise, while off-road modes tackle mud or snow via low-range gearing. Consumer feedback praises its ‘tank-like’ solidity and car-like ride, ideal for road trips.
Technology and Safety Features
Mercedes packed the GLS with aids like adaptive cruise control, lane-keeping, and automatic emergency braking—earning high marks for crash avoidance. The infotainment supports Apple CarPlay/Android Auto on later models, with navigation and a Burmester sound system. Blind-spot monitoring and cross-traffic alert add peace of mind for family use.
Reliability and Ownership Costs
Owners report strong durability, with the nine-speed transmission lasting over 100,000 miles if serviced promptly. Common issues include clunky shifts if neglected and air suspension leaks, but engines prove robust. Fuel economy varies (25-40mpg diesel), and insurance groups range 40-50, reflecting its power. Maintenance at Mercedes dealers is pricey, but used prices start under £30,000 for well-kept examples.
Consumer ratings average 4.5/5, with 76-77% recommending it for comfort and performance, though value trails due to depreciation.
Comparing the GLS to Rivals
| Model | 0-62mph (s) | Boot (liters) | Price (used, £) |
|---|---|---|---|
| Mercedes GLS 350d | 7.8 | 2,400 | 25,000-40,000 |
| Audi Q7 3.0 TDI | 6.1 | 2,050 | 28,000-45,000 |
| Volvo XC90 D5 | 8.7 | 1,856 | 22,000-38,000 |
| Range Rover Sport | 7.2 | 1,800 | 30,000-50,000 |
The GLS excels in space and smoothness over the sportier Q7 or tech-forward XC90, but lags in modern cabin appeal.
Trims and Specifications Overview
- GLS 350d: Entry diesel, 258hp, AMG Line styling.
- GLS 400: Petrol V6, 333hp, premium audio.
- GLS 450: Updated V6 hybrid assist post-2016.
- GLS 63 AMG: V8 beast, 585hp, performance pack.
Pros and Cons at a Glance
- Pros: Vast interior, refined ride, powerful engines, towing prowess.
- Cons: Thirsty on petrol, aging tech, high running costs.
Is the 2015-2019 GLS Right for You?
For buyers wanting a used luxury hauler with seven seats and limo-like comfort, the GLS delivers unmatched versatility. Test drive to feel the suspension magic, and prioritize full service history to avoid pitfalls.
Frequently Asked Questions (FAQs)
What is the fuel economy of the Mercedes GLS 350d?
Expect 35-44mpg combined, best on long runs with the efficient nine-speed auto.
How reliable is the 2015-2019 GLS?
Generally solid, with 76% owner recommendation; regular oil changes key for transmission longevity.
Can the GLS tow a trailer?
Yes, up to 3,500kg braked, perfect for caravans or boats.
What’s the boot space with all seats up?
260 liters, enough for daily shopping; expands massively when folded.
Is the GLS good off-road?
Absolutely, with air suspension, low-range transfer case, and terrain modes.
References
- Used 2019 Mercedes-Benz GLS-Class Consumer Reviews — Edmunds. 2019. https://www.edmunds.com/mercedes-benz/gls-class/2019/consumer-reviews/
- 2019 Mercedes-Benz GLS Consumer Reviews — Kelley Blue Book. 2019. https://www.kbb.com/mercedes-benz/gls/2019/consumer-reviews/
- 2019 Mercedes-Benz GLS Reviews, Ratings, Prices — Consumer Reports. 2019. https://www.consumerreports.org/cars/mercedes-benz/gls/2019/overview/
- (2013-2019) Mercedes-Benz GLS Review and Prices — Carwow. 2018. https://www.carwow.co.uk/mercedes/gls/2018
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