Mercedes-Benz GLS: When it comes to luxury SUVs, size does matter—and few cars prove this better than the Mercedes-Benz GLS. Launched in its third generation in 2019 and refreshed in 2023, the GLS is longer, wider, and more luxurious than ever before. Often referred to as the “S-Class of SUVs”, this giant delivers the kind of refinement, space, and comfort that’s difficult to match, even in today’s crowded luxury SUV market.
From the outside, it’s immediately clear that this is not just another large SUV. Measuring over 5.2 meters in length, the GLS dwarfs most vehicles on UK roads, making it a challenge to park in cities but a king on motorways. With seating for seven fully grown adults, an array of powertrain options including a 604bhp AMG V8, and even a posh Maybach version, the GLS covers the full spectrum of luxury SUV ownership.
The facelift in 2023 brought subtle but meaningful changes: a new grille, revised bumpers, updated LED light signatures, fresh alloy designs, and a smarter MBUX infotainment system. Combined with improved materials and options inside, the GLS now feels fresher and more in line with Mercedes’ latest luxury standards.
Mercedes-Benz GLS Specifications
| Feature | Details |
|---|---|
| Model | Mercedes-Benz GLS (3rd Gen, Facelift 2023) |
| Body Style | Full-size luxury SUV (7-seater) |
| Engines (UK) | 3.0L straight-six diesel (362bhp, 553lb ft), 3.0L straight-six petrol (376bhp, 369lb ft), 4.0L twin-turbo V8 AMG (604bhp, 627lb ft), 4.0L V8 Maybach (550bhp, 538lb ft) |
| Hybrid Tech | Mild-hybrid assist (EQ Boost) |
| Drivetrain | 4Matic all-wheel drive |
| Transmission | 9-speed automatic |
| 0–62 mph | 4.2s (AMG GLS 63), ~6.0s (GLS 450d) |
| Top Speed | Electronically limited to 155 mph (varies by model) |
| Dimensions | Length: 5.2m+, Width: 2.0m+, Wheelbase: 3.1m |
| Kerb Weight | Up to 2,825kg (Maybach GLS 600) |
| Seating | 7 seats standard (Maybach: 4 or 5 seats) |
| Starting Price (UK) | £110,800 (GLS 450d) |
| AMG GLS 63 | ~£150,000+ |
| Maybach GLS 600 | ~£180,000+ |
Exterior Design
The Mercedes-Benz GLS is unapologetically huge. Its commanding stance, chrome-laden grille, and sleek LED light signatures make it one of the most imposing luxury SUVs on the road. The 2023 facelift added chunkier horizontal grille bars, new bumpers, and fresh alloy designs, making it look sharper without losing its stately appeal.
The Maybach GLS takes opulence even further, featuring a monstrous chrome grille, Maybach-specific details, and optional 23-inch forged wheels, making it a rolling statement of wealth.
Interior and Comfort
Inside, the GLS lives up to its S-Class-inspired reputation. Seven adults can travel in comfort thanks to a spacious cabin and a long wheelbase. The third-row seats are adult-friendly, which is rare even in large SUVs, and luggage space remains generous even with all seats up.
The interior features Mercedes’ latest MBUX infotainment system, complete with a widescreen digital cockpit, voice assistant, and touch functionality. The facelift introduced a new steering wheel, additional leather colors, and updated trim options, ensuring the cabin feels more bespoke.
While plush, some reviewers argue that the GLS should feel even more opulent at its price point. That’s where the Maybach GLS 600 steps in, offering four-seat luxury, executive-class rear seating, and exclusive materials.
Performance and Engines
The UK lineup starts with the GLS 450d AMG Line Premium Plus, powered by a 3.0-litre straight-six diesel mild hybrid producing 362bhp and a mammoth 553lb ft of torque. This engine balances performance with efficiency, making it a popular choice for long-distance cruising.
The GLS 450 petrol uses the same straight-six layout, producing 376bhp and 369lb ft of torque, ideal for those who prefer petrol refinement.
For enthusiasts, the AMG GLS 63 4Matic+ Night Edition packs a 4.0-litre twin-turbo V8 with 604bhp and 627lb ft, propelling this 2.6-tonne behemoth from 0–62mph in just 4.2 seconds. It’s brutally fast yet surprisingly composed.
At the top sits the Maybach GLS 600, with its 550bhp hybridised V8. This model focuses less on speed and more on absolute luxury, offering a choice of four- or five-seat layouts.
Technology and Features
- MBUX infotainment with AI-based voice assistant
- Digital cockpit with large high-res screens
- Ambient lighting and premium Burmester sound system
- Advanced driver assistance: adaptive cruise, lane-keeping, collision avoidance
- Optional executive rear seating (Maybach version)
The facelift in 2023 improved both infotainment performance and customization options, addressing earlier criticisms.
Driving Experience
Despite its sheer size, the GLS is remarkably composed on motorways, where it feels like a long-distance cruiser built for comfort. Adaptive air suspension ensures a plush ride, although narrow city streets and tight car parks remain its Achilles’ heel.
The AMG variant stiffens things up, adding sharper handling but compromising comfort slightly. Still, the GLS excels at swallowing miles in luxury and silence, with road and wind noise kept impressively low.
Rivals
The GLS competes with:
- BMW X7 – more aggressive styling, equally massive presence
- Range Rover – benchmark for luxury and off-road pedigree
- Land Rover Defender 130 – larger still, with rugged versatility
- Audi Q7 / Volvo XC90 – smaller, slightly more affordable alternatives
Also read: New Kia K4 Review: VW Golf-Sized Petrol Hatchback Headed to the UK
Verdict
The Mercedes-Benz GLS is a masterclass in luxury SUV design. It combines enormous space, refined comfort, advanced technology, and powerful engines into one package. Families will love its practicality, long-distance comfort, and genuine seven-seat usability.
However, its sheer size makes it challenging in urban settings, and some may find the interior not quite as opulent as expected—unless they opt for the Maybach version.
In short, the GLS is a very well-executed luxury SUV that lives up to its billing as the S-Class of SUVs. If you have the driveway space and budget, it’s one of the finest family luxury vehicles available.
FAQs
1. How much does the Mercedes-Benz GLS cost in the UK?
The GLS 450d starts at £110,800, while the GLS 450 petrol is priced from £114,180. The AMG GLS 63 costs over £150,000, and the Maybach GLS 600 exceeds £180,000.
2. How many seats does the GLS have?
The GLS comes with seven seats as standard, with enough space for adults in the third row. The Maybach GLS offers a luxurious four- or five-seat configuration.
3. What engines are available in the GLS?
Options include a 3.0L straight-six diesel (362bhp), a 3.0L straight-six petrol (376bhp), a 4.0L twin-turbo V8 AMG (604bhp), and a 4.0L V8 Maybach (550bhp). All feature mild-hybrid assistance.
4. Is the GLS good for city driving?
While refined and comfortable, the GLS is very large for narrow city streets and tight parking spaces. It’s best suited for motorways and open roads.
5. Who are the main rivals of the GLS?
Key competitors include the BMW X7, Range Rover, Land Rover Defender 130, Audi Q7, and Volvo XC90. The GLS distinguishes itself with Mercedes’ refinement and seven-seat comfort.