Mercedes GL-Class 2015 2024 Review: Ultimate Luxury

The 2015-2024 Mercedes-Benz GL-Class offers unparalleled luxury, robust performance, and advanced technology, making it a top choice for families and individuals seeking a premium large SUV experience. It excels in comfort, safety, and sophisticated driving dynamics.

The world of luxury SUVs can be overwhelming, with countless options promising prestige and capability. If you’re drawn to the sophisticated allure and commanding presence of the Mercedes-Benz GL-Class, you’re not alone. This esteemed nameplate has long been a benchmark for what a full-size luxury SUV should be. Between the 2015 and 2024 model years, the GL-Class (which later evolved into the GLS) consistently delivered an experience that blends cutting-edge technology with opulent comfort and impressive performance. This review will guide you through what makes these GL-Class models true icons of automotive luxury, breaking down their key features, performance figures, and what to look for. Let’s dive into the ultimate luxury that the Mercedes-Benz GL-Class represents.

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Mercedes GL-Class 2015-2024: A Legacy of Luxury and Performance

The Mercedes-Benz GL-Class has been a staple in the luxury SUV market for many years, and the models spanning from 2015 to 2024 represent a significant evolution of this iconic vehicle. This period saw the GL-Class solidify its reputation as a top-tier choice for those who demand spaciousness, comfort, and advanced technology without compromising on driving pleasure.

The Evolution of the GL-Class: From X166 to GLS

The models we’re focusing on primarily fall under the first generation X166 chassis (2013-2019) and the subsequent transition to the GLS badge, which began with the second generation X167 (2020 onwards). While the name changed, the spirit of the GL-Class – its focus on luxurious, three-row capability – remained.

2015-2019 (X166 Generation): This period saw the GL-Class establish its strong presence. Models like the GL350 BlueTEC, GL450, and the performance-oriented GL550 (and later, AMG GL63) offered a diverse range of powertrains and luxury appointments. Updates over these years focused on refining technology, enhancing interior comfort, and introducing new safety features.
2020-2024 (X167 Generation – Badged as GLS): Mercedes-Benz rebranded the GL-Class to the GLS for the 2020 model year, re-aligning it with the brand’s nomenclature strategy (S-Class for sedans, GLC/GLE for mid-size SUVs, etc.). The X167 generation represented a significant leap forward in design, technology, and performance, further elevating the concept of an SUV as a “S-Class on-road”.

Why the GL-Class (and its GLS successor) is a Reigning Luxury Champion

The enduring appeal of the GL-Class and GLS stems from a few key areas:

Spacious and Opulent Interior: Three rows of comfortable seating designed for adults, not just children. High-quality materials, exquisite craftsmanship, and a quiet cabin.
Powerful and Refined Performance: A range of potent engines, from efficient diesel options to robust V8s, all mated to smooth, capable transmissions.
Advanced Technology and Safety: Cutting-edge infotainment systems, driver assistance features, and the latest in automotive safety innovations.
Comfortable Ride Quality: A sophisticated suspension system that glides over imperfections, making long journeys effortless.

Interior Excellence: What Makes the GL-Class Cabin Stand Out

Step inside a Mercedes-Benz GL-Class or GLS, and you’re stepping into a sanctuary of luxury and advanced design. These vehicles were engineered to provide an exceptional experience for every occupant, from the driver to those in the rearmost seats.

First-Class Seating and Material Quality

Mercedes-Benz has always set a high standard for interior materials, and the GL-Class is no exception. Expect to find:

Premium Leather Upholstery: Supple, high-quality leather as standard or optional, often with sophisticated stitching.
Real Wood and Metal Trim: Elegant accents of genuine wood veneers or brushed aluminum and chrome enhance the sense of occasion.
Ergonomically Designed Seats: The front seats are often multi-contour with heating, ventilation, and massage functions, offering unparalleled comfort. Second-row seats are also generously proportioned and comfortable.
Generous Third-Row Space: Unlike many SUVs, the GL-Class and GLS are known for offering a usable third row, capable of accommodating adults on shorter trips and children or teenagers more comfortably. Power-folding rear seats make accessing this third row effortless.

Technology and Infotainment

From the 2015 models onwards, the GL-Class was equipped with Mercedes-Benz’s intuitive COMAND infotainment system. By the time the GLS emerged, this evolved into the even more sophisticated MBUX (Mercedes-Benz User Experience).

COMAND (2015-2019): Featured a high-resolution display, navigation, Bluetooth connectivity, and an array of apps. While functional, it was controlled via a rotary dial and buttons on the center console.
MBUX (2020-2024): This system is a game-changer, featuring a larger, more visually stunning widescreen display (often integrated into a digital cockpit), natural voice control (“Hey Mercedes”), and advanced features like augmented reality navigation. Touchscreen, touchpads, and steering wheel controls offer multiple ways to interact with the system.
Premium Sound Systems: Burmester surround sound systems are often available, delivering an immersive audio experience.

Ambiance and Comfort Features

Multi-Zone Climate Control: Ensuring everyone in the cabin enjoys their preferred temperature.
Ambient Lighting: Customizable ambient lighting creates a sophisticated mood.
Panoramic Sunroof: A large sunroof can make the spacious cabin feel even airier.
Advanced Sound Insulation: The cabin is exceptionally quiet, minimizing road and wind noise for a serene atmosphere.

Note: Horsepower and torque figures can vary slightly based on exact model year and specific tuning. The BlueTEC diesel engines were known for their excellent fuel economy and substantial torque.

Transmissions and Drivetrain

7G-TRONIC (Older models): A robust 7-speed automatic transmission found in many of the earlier GL-Class models.
9G-TRONIC (Newer models): The 9-speed automatic transmission, introduced in later X166 models and standard on the X167 GLS, offers smoother shifts and improved efficiency.
4MATIC All-Wheel Drive: Mercedes-Benz’s signature all-wheel-drive system is standard on virtually all GL-Class and GLS models. It provides excellent traction and stability in various driving conditions, from wet roads to light off-road excursions.

Mild-Hybrid Technology (EQ Boost)

With the transition to the GLS nameplate and the X167 generation, Mercedes-Benz introduced its EQ Boost mild-hybrid technology on certain models like the GLS580. This system uses an integrated starter-generator to provide a small power and torque boost during acceleration, improve fuel efficiency, and enable smoother start/stop functionality.

Driving Dynamics and Comfort

The GL-Class and GLS are large, luxurious SUVs, and their driving experience reflects this. Mercedes-Benz engineers have masterfully balanced the capability of an SUV with the refined ride and handling expected of a luxury brand.

Suspension and Ride Quality

AIRMATIC Air Suspension: This is a commonly found option or standard feature, especially in higher trims and later models. AIRMATIC allows the driver to adjust the vehicle’s ride height and damping characteristics. It provides a remarkably smooth and composed ride, absorbing road imperfections with ease. It also helps reduce body roll in corners. You can often select between “Comfort” and “Sport” modes.
Active Curve System (Optional/Higher Trims): This system actively counteracts body roll during cornering by using adjustable stabilizers. This significantly enhances handling agility, making the large SUV feel more planted and stable.

Handling and Steering

While not designed for track-day performance (aside from the AMG variants), the GL-Class and GLS offer confident and predictable handling. The steering is typically well-weighted and provides good feedback, allowing for precise maneuvering. Parking is made easier with features like surround-view cameras and parking assist systems.

Off-Road Capability

The standard 4MATIC AWD system, combined with the adjustable ride height of AIRMATIC suspension, grants the GL-Class and GLS surprisingly capable off-road credentials for their class. They are well-suited for venturing onto unpaved roads, tackling moderate inclines, and handling snowy conditions. For those who plan more serious off-roading, consider vehicles equipped with the optional Off-Road Engineering Package (available on some X166 and X167 models), which typically includes features like underbody skid plates, a lockable center differential, and specialized driving modes.

Safety Features: Peace of Mind on Every Journey

Safety is paramount in any luxury vehicle, and Mercedes-Benz is at the forefront of automotive safety innovation. Both the GL-Class and GLS are equipped with a comprehensive suite of active and passive safety systems designed to protect occupants and assist the driver.

Active Safety Features (Driver Assistance)

These systems actively help prevent accidents or mitigate their severity:

DISTRONIC PLUS (Adaptive Cruise Control): Maintains a set speed and distance from the vehicle ahead, automatically braking and accelerating as needed. Later versions offer more advanced features like steering assist.
Active Lane Keeping Assist / Active Lane Change Assist: Warns the driver if they drift out of their lane and can help steer the vehicle back into the lane.
Active Blind Spot Assist: Warns of vehicles in the blind spot and can intervene with braking to prevent a collision during a lane change.
PRE-SAFE® System: Detects an impending collision and prepares the vehicle by tightening seatbelts, moving seats to an optimal position, and closing windows and the sunroof. The PRE-SAFE® PLUS system can also apply brakes to prevent or mitigate post-collision impacts.
Active Brake Assist: Detects potential collisions with other vehicles, pedestrians, or cyclists and can automatically apply braking if the driver doesn’t react.
Crosswind Assist: Helps stabilize the vehicle when strong side winds are detected.

Passive Safety Features

These systems protect occupants in the event of a collision:

Multiple Airbags: A comprehensive system of front, side, curtain, and knee airbags.
High-Strength Body Structure: Engineered for maximum occupant protection.
ISOFIX Child Seat Anchorage Points: For secure installation of child seats.

Other Safety Amenities

360-Degree Camera System: Provides an overhead view of the vehicle and its surroundings, greatly assisting with parking and maneuvering in tight spaces.
Night View Assist Plus: Uses infrared cameras to detect pedestrians and large animals in the dark, displaying them on a separate screen.
Driver Attention Assist: Monitors driver behavior for signs of fatigue and alerts the driver to take a break.

For more detailed information on Mercedes-Benz safety technologies and their development, you can refer to resources like the National Highway Traffic Safety Administration (NHTSA), which provides safety ratings and recall information for vehicles.

Key Model Years and What to Look For

When considering a pre-owned Mercedes-Benz GL-Class or GLS, understanding the nuances of different model years can help you find the perfect fit.

2015-2016 (X166 Facelift):

These models represent the refreshed version of the first-generation GL-Class. Key enhancements included updated styling, improved engines, and the introduction of more advanced safety features. The GL350 BlueTEC diesel continues to be a strong contender for efficiency, while the GL450 and GL550 offer V8 power.

2017-2019 (X166 Continued):

These years saw further refinement. The GL550 was often replaced by the GL450 with the 4.7L V8, or the GL550 badge reappeared with updated powertrains. The AMG GL63 remained the pinnacle of performance. While still part of the X166 generation, these models often received software updates and minor feature tweaks.

2020 onwards (X167 – GLS):

This is the start of the second-generation GLS. It’s a significant redesign:

Exterior Design: More modern and fluid styling.
Interior Design: A completely new cabin featuring the large dual-screen MBUX display.
Technology: MBUX infotainment, advanced driver assistance systems, and improved connectivity.
Powertrains: New V6 and V8 engines, often with EQ Boost mild-hybrid technology. The GLS 450 became more potent with the V6 biturbo and EQ Boost. The GLS 580 replaced the GL550 as the V8 model.

What to Look For When Buying:

Service History: A comprehensive and consistently maintained service history from a reputable Mercedes-Benz dealer or qualified independent specialist is crucial.
Trim Levels and Options: GL-Classes and GLS models are highly customizable. Check for desirable options like AIRMATIC air suspension, premium sound systems, panoramic sunroof, and advanced driver assistance packages.
Mileage and Condition: As with any luxury vehicle, condition and mileage are key indicators of wear and tear. Inspect the interior for wear on leather and trim, and the exterior for paint condition and panel alignment.
Pre-Purchase Inspection (PPI): Always recommended for any used luxury vehicle. Have a trusted mechanic inspect the vehicle thoroughly, paying attention to common issues like transmission, suspension, and engine components.

Comparing Trims and Engines

Understanding the different trim levels and engine options across the GL-Class and GLS spectrum helps in making an informed decision, whether you’re buying new or used.

Key Trims and Their Characteristics:

GL350 / GLS350 (Diesel):
Focus: Fuel efficiency and torque.
Pros: Best MPG in the lineup, excellent for long-distance cruising due to strong low-end torque.
Cons: Diesel engine can be noisier than petrol variants, potentially fewer performance-oriented features.
GL450 / GLS450 (V6 Petrol / V6 Biturbo Petrol):
Focus: Balanced blend of performance and luxury.
Pros: Smooth, powerful enough for most situations, good all-around performer. The later V6 Biturbo with EQ Boost offers a significant upgrade.
Cons: Not as powerful as V8 models.
GL550 / GLS580 (V8 Petrol / V8 Biturbo Petrol with EQ Boost):
Focus: Maximum power, acceleration, and luxury.
Pros: Strongest acceleration, effortless power delivery, often comes with higher-end standard features. The GLS580 with EQ Boost offers an even more refined and responsive experience.
Cons: Lower fuel economy, higher purchase price and running costs.
AMG GL63 / AMG GLS63 (Hand-built V8 Biturbo Petrol):
Focus: High-performance SUV.
Pros: Unmatched acceleration and driving dynamics for an SUV of its size, aggressive styling, sport-tuned suspension and brakes.
Cons: Significantly higher price, lower fuel economy, potentially firmer ride than standard models.

Engine Performance Table (Example):

Let’s compare the gasoline V6 and V8 options from the later X166 and early X167 generations to illustrate the differences in performance.

| Model | Engine | Horsepower | Torque | 0-60 mph (approx.) | Transmission | Drivetrain | Notes |
|———–|—————————|————|———–|——————–|————–|————–|——————————————–|
| GLS450 |

Mercedes GL-Class 2015 2024 Review: Ultimate Luxury

Mercedes GL-Class 2015-2024: A Legacy of Luxury and Performance

The Evolution of the GL-Class: From X166 to GLS

Why the GL-Class (and its GLS successor) is a Reigning Luxury Champion