Choosing the Perfect Mercedes-Benz GLS: A Complete Guide For Used Ones
Looking for the ultimate luxury SUV that balances power, comfort, and cutting-edge technology? The Mercedes-Benz GLS lineup offers a perfect blend of spacious interiors, advanced tech, and a smooth ride, making it one of the best full-size luxury SUVs on the market.
But with options like the GLS 450 and GLS 580, which one is the right choice for you? Whether you prioritize family-friendly versatility or commanding V8 power, this guide breaks down every generation and model to help you find your ideal GLS.
For those considering the Mercedes-AMG GLS-Class or the ultra-luxurious Maybach GLS 600, stay tuned—we’ll cover those models in a separate blog!
Table of Contents
Model History & Evolution
The Mercedes-Benz GLS, originally introduced as the GL-Class in 2006, has undergone significant transformations over the years. Positioned above the GLE (formerly the M-Class), the GLS serves as Mercedes-Benz’s flagship SUV, offering three rows of seating and accommodating up to seven passengers.
First Generation (X164, 2006–2012):
Debuting as the GL-Class, this generation set the foundation with a focus on luxury and space.
- Spacious three-row seating, making it a true family-friendly luxury SUV.
- Multiple engine options, including a fuel-efficient V6 and a powerful V8.
- Air suspension for a smooth ride, though some early models had reliability concerns.
- Lacked some of the advanced infotainment and driver assistance features seen in later models.
Second Generation (X166, 2013–2019):
In 2016, the GL-Class was rebranded as the GLS to align with Mercedes-Benz’s updated naming convention. This generation saw enhancements in technology and comfort, solidifying its position in the luxury SUV market.
- Introduction of new trims like the GLS 350d, GLS 450, and GLS 550 with improved powertrains.
- Upgraded interior with high-quality materials and a larger infotainment screen.
- Advanced safety features, including blind-spot monitoring and collision prevention assist.
- Enhanced air suspension for a smoother and more composed ride.
Third Generation (X167, 2020–Present):
Launched in 2019, the current generation boasts modern design cues, advanced technology, and improved performance. The 2024 facelift introduced subtle styling updates and new tech features, keeping the GLS contemporary and competitive.
- Introduction of the GLS 450 and GLS 580 with mild-hybrid technology for better efficiency.
- New MBUX (Mercedes-Benz User Experience) infotainment system with dual 12.3-inch screens and voice controls.
- E-Active Body Control suspension for an even smoother and more adaptable ride.
- 2024 facelift brought refreshed styling, improved driver-assist features, and enhanced luxury elements.
Comprehensive Specs & Features
While the first-generation Mercedes-Benz GL-Class (2006–2012) laid the foundation for this full-size luxury SUV, it’s now quite dated in terms of technology, performance, and overall refinement. If you’re in the market for used Mercedes-Benz GLS, you’ll want to focus on the second and third generations, which offer better features, improved reliability, and more advanced tech. Let’s break them down.
Second Generation (X166, 2013–2019): A Luxury SUV Refined
The second-generation GLS marked a major leap in luxury and performance. With the 2016 rebranding from GL-Class to GLS, Mercedes-Benz positioned it as the “S-Class of SUVs,” emphasizing top-tier comfort, technology, and driving dynamics. This generation provides a great balance between affordability and premium features.
2017 Mercedes-Benz GLS 350d (Diesel-powered efficiency with luxury)
A great choice for those seeking a more fuel-efficient option without sacrificing comfort, the GLS 350d is a solid performer in the used car market.
- 3.0L V6 diesel engine producing 255 hp and 455 lb-ft of torque.
- 9-speed automatic transmission for smooth shifts.
- Standard 4MATIC all-wheel drive, making it ideal for pre-owned car buyers who need extra traction.
- Combined fuel economy of around 22 mpg.
- Standard air suspension for a plush ride.
2017–2019 Mercedes-Benz GLS 450 (The perfect all-rounder)
The GLS 450 offers a great balance of power, luxury, and efficiency, making it one of the most popular models on the used market.
- 3.0L twin-turbo V6 engine with 362 hp and 369 lb-ft of torque.
- 9-speed automatic transmission for seamless driving.
- 0-60 mph in just 6.5 seconds—impressive for a full-size SUV.
- High-quality leather interior with optional wood trims.
- Infotainment system with an 8-inch display and premium audio system.
2017–2019 Mercedes-Benz GLS 550 (Power and prestige)
For those who want extra performance and a more premium feel, the GLS 550 delivers with a V8 powertrain and a more luxurious cabin.
- 4.7L twin-turbo V8 engine pushing 449 hp and 516 lb-ft of torque.
- 0-60 mph in 5.2 seconds, making it one of the quickest in its class.
- Upgraded leather upholstery, heated and ventilated seats.
- Adaptive air suspension for superior ride comfort.
- 21-inch AMG-style wheels for a more aggressive stance.
Third Generation (X167, 2020–Present): Modern Luxury & Performance
With a complete redesign in 2020, the third-generation GLS introduced a more refined look, cutting-edge technology, and new mild-hybrid powertrains. This is the generation that feels the most modern.
2020–Present Mercedes-Benz GLS 450 (Refined luxury with efficiency)
The most common model in the lineup, the GLS 450, is a fantastic mix of power and fuel economy with its mild-hybrid tech.
- 3.0L inline-6 turbo engine with EQ Boost, producing 362 hp and 369 lb-ft of torque.
- Integrated 48V mild-hybrid system for better efficiency and extra power.
- 0-60 mph in about 5.9 seconds.
- MBUX infotainment system with dual 12.3-inch displays and voice control.
- Standard 4MATIC all-wheel drive and air suspension for a plush ride.
2020–Present Mercedes-Benz GLS 580 (V8 power meets advanced tech)
If you want V8 performance with cutting-edge luxury, the GLS 580 is the one to get.
- 4.0L twin-turbo V8 engine with EQ Boost, delivering 483 hp and 516 lb-ft of torque.
- 0-60 mph in just 5.2 seconds—exceptional for a full-size SUV.
- E-Active Body Control suspension that adapts to road conditions for superior ride quality.
- Premium interior with Nappa leather, heated and ventilated seats.
- Advanced driver assistance features, including adaptive cruise control and lane-keeping assist.
The 2024 Mercedes-Benz GLS facelift brought slight exterior styling tweaks and improved driver-assist features, keeping it fresh and competitive.
For an expert perspective, check out Car and Driver’s Mercedes-Benz GLS review.
Buying Guide & Competitive Analysis
When considering a used Mercedes-Benz, it’s crucial to evaluate how it holds up against the competition and which model best suits your needs. While the GLS excels in luxury and technology, it’s not without its flaws. Below, we’ll cover common issues, how the GLS compares to its main rivals, and which models fit different driving preferences.
Common Issues with the Mercedes-Benz GLS
While the Mercedes-Benz GLS is a top choice among luxury used SUVs in United States, some common issues have been reported:
- Water Intrusion (2017–2019 Models) – Some owners have reported leaks, particularly around the sunroof and door seals. Regular inspections and proper sealing can help prevent this.
- Electrical Problems – The GLS, especially in newer models, has multiple batteries, including auxiliary ones. If not properly maintained, they can cause electrical malfunctions.
- Air Suspension Concerns – While the GLS provides a smooth ride with its air suspension, some owners have reported premature wear, leading to costly repairs. Checking the suspension condition before buying is crucial.
- Timing Chain and Engine Components – Some high-mileage V8 models have had issues with timing chain stretch, which can lead to performance problems. Regular maintenance reduces the risk.
How the Mercedes-Benz GLS Compares to the Competition
The GLS competes with some of the best full-size luxury SUVs on the market. Here’s how it stacks up against its top three competitors:
BMW X7 – Sporty Performance with Luxury
The BMW X7 is one of the closest competitors to the GLS, offering a mix of performance and luxury with a sportier edge.
- Stronger driving dynamics – The X7 delivers sharper handling and a more engaging drive.
- More powerful engine options – Offers a standard 3.0L turbo inline-6 and an optional twin-turbo V8.
- Slightly less cargo space – While luxurious, the X7’s third row is a bit tighter compared to the GLS.
- Infotainment is user-friendly but can feel complex due to BMW’s iDrive system.
Best for: Those who prioritize performance and want a luxury SUV that feels more like a sports sedan behind the wheel.
Audi Q7 – High-Tech Interior and Agile Handling
The Audi Q7 isn’t as large as the GLS but offers an excellent blend of technology, comfort, and all-weather capability.
- More compact than the GLS – Easier to maneuver in city driving.
- Superior infotainment system – The MMI system with dual screens is one of the best in the segment.
- Less cargo and third-row space – The Q7’s third row is tighter, making it better suited for occasional use.
- Standard Quattro AWD – Ensures strong performance in all weather conditions.
Best for: Buyers looking for a tech-focused luxury SUV with a smaller footprint but premium features.
Lexus LX – Reliability and Off-Road Capability
The Lexus LX is the most rugged competitor in this class, offering legendary reliability and serious off-road capabilities.
- Bulletproof reliability – Lexus’ proven track record means fewer repair costs over time.
- V8 power, but outdated tech – The LX’s naturally aspirated V8 is durable but less efficient compared to GLS’s turbocharged engines.
- Best off-road capability – Ideal for buyers who want a luxury SUV that can also handle rugged terrain.
- Interior quality is high, but infotainment lags – The system feels outdated compared to the GLS and other rivals.
Best for: Buyers who want a long-lasting, off-road-capable luxury SUV with fewer reliability concerns.
Which Mercedes-Benz GLS Model is Right for You?
The GLS lineup caters to different types of buyers. Here’s a breakdown of which model best suits various needs:
- For the Budget-Conscious Buyer: 2017–2019 GLS 450 – Offers a balance of luxury, performance, and affordability with solid fuel economy.
- For the Luxury Enthusiast: 2020–Present GLS 580 – Packed with advanced tech, a V8 powertrain, and high-end materials.
- For the Performance-Oriented Driver: 2017–2019 GLS 550 – Delivers strong V8 power and a premium driving experience without the newer model’s price tag.
- For Families Who Need Extra Space: Any GLS model – The GLS is one of the most spacious options in its class, perfect for long road trips and carpooling.
- For Buyers Who Want the Latest Tech: 2020–Present GLS 450 – Features the new MBUX infotainment system and mild-hybrid powertrain for better efficiency.
Best Years to Buy:
Models from the second generation (2013–2019) are often recommended for their balance of modern features and relative affordability. Specifically, the 2017–2019 models offer updated technology and design. However, potential buyers should be vigilant about the common issues mentioned earlier.
Why Buying a Used Car is a Good Choice
Opting for a used luxury SUV in Nashville—especially a high-end model like the GLS—comes with several advantages:
- Cost Savings – Avoid the steep depreciation that new luxury cars experience, often losing 30-40% of their value in the first few years.
- Lower Insurance Premiums – Used vehicles generally come with reduced insurance costs, saving you money over time.
- Proven Reliability – With a used model, you have access to real-world owner reviews and reliability data, making it easier to make an informed decision.
- More Features for Less – You can often afford a higher trim or better-equipped model in the used market compared to buying new.
How to Choose the Right Dealership for a Used GLS
Selecting the right dealership matters just as much as choosing the right model
Here’s what to look for:
Transparent vehicle history reports.
Thorough multi-point inspections.
Flexible financing options.
Verified customer reviews.
Optional extended warranties for peace of mind.
AutoPro Nashville exemplifies these standards, offering a curated inventory of pre-owned Mercedes-Benz GLS models backed by expert support and nationwide delivery.
Final Thoughts
The Mercedes-Benz GLS isn’t just a luxury SUV — it’s a statement of refined comfort, versatility, and innovation. From the smooth six-cylinder GLS 450 to the commanding V8 GLS 580, every model brings S-Class-level luxury to SUV form.
Explore AutoPro Nashville’s latest lineup of pre-owned Mercedes-Benz GLS models here.
What is the difference between the Mercedes-Benz GLS 450 and GLS 580?
The GLS 450 features a turbocharged 3.0L inline-6 engine with mild-hybrid tech, while the GLS 580 upgrades to a 4.0L twin-turbo V8 for more power and performance.
What is the fuel economy of the Mercedes-Benz GLS?
The GLS 450 gets around 19 mpg city / 24 mpg highway, while the GLS 580 averages 16 mpg city / 21 mpg highway, depending on driving conditions.
What technology features come in the Mercedes-Benz GLS?
The MBUX infotainment system, voice control, Burmester® surround sound, and available augmented reality navigation make the GLS a tech-savvy luxury SUV.
What is the starting price of the Mercedes-Benz GLS?
The GLS 450 starts around $87,000, while the GLS 580 begins at approximately $111,000, depending on options and trim levels.
