2021 Mercedes-Benz GLC vs 2021 Mercedes-Benz GLS
Overview | |
MSRP$76,000 | MSRP$43,200 |
Listings15 | Listings69 |
Ratings & Reviews | |
User Reviews | User Reviews |
Expert reviews8.3 out of 10 | Expert reviews8.0 out of 10 |
2021 Mercedes-Benz GLS Reviews SummaryThe “S” in the 2021 Mercedes-Benz GLS name is meant to connect the SUV to the S-Class flagship sedan. In this sense, the GLS is the S-Class of SUVs, and it delivers on that positioning. The 2021 GLS-Class has three rows of spacious seating, and puts comfort above all else. The GLS can hold groceries, weekend bags, antique desks purchased from a roadside consignment shop—all things that would require a lot of negotiating in the S-Class sedan. The GLS is one member of a growing fraternity of full-size, three-row, luxury SUVs. Their ranks include the Cadillac Escalade, Lincoln Navigator, Infiniti QX80, and the more recent BMW X7. The GLS sets itself apart with a higher standard of luxury, and impressive performance… if you’re willing to shell out the cash. | |
2021 Mercedes-Benz GLC Reviews SummaryThe modern compact luxury SUV market is an embarrassment of riches. Shoppers have more options than ever before, and all of them are terrific vehicles. There’s the BMW X3, Audi Q5, Volvo XC60, Acura RDX, Alfa Romeo Stelvio, and even the newcomer Lincoln Corsair. Not to be left out of this dizzying list is one of the segment’s most popular options, the 2021 Mercedes-Benz GLC. While the X3 arguably kicked off the small luxury SUV craze, the bar was raised with the GLC’s predecessor, the GLK. But even the GLK felt like a stopgap compared to a fully realized vehicle like the GLC. It encapsulates everything that buyers are looking for in a compact luxury SUV—an upscale cabin, cutting-edge infotainment and safety technology, and driving dynamics that are equal parts athletic and comfortable. Many vehicles in the aforementioned list have some or all of these things, but few combine them all as elegantly as the GLC. Mercedes-Benz happily boasts the GLC is its best-seller, and with good reason. But should you count yourself among one of their customers? Read on to find out. | |
No video found | |
Popular Features & Specs | |
Engine3.0L 362 hp I6 | Engine2.0L 255 hp I4 |
Drive TrainAWD | Drive TrainRWD |
Seating Capacity7 | Seating Capacity5 |
Horsepower362 hp @ 5500 rpm | Horsepower255 hp @ 5800 rpm |
MPG City20 | MPG City22 |
MPG Highway24 | MPG Highway29 |
Engine | |
Engine Name3.0L 362 hp I6 | Engine Name2.0L 255 hp I4 |
Torque369 lb-ft @ 1600 rpm | Torque273 lb-ft @ 1800 rpm |
Horsepower362 hp @ 5500 rpm | Horsepower255 hp @ 5800 rpm |
DrivetrainAWD | DrivetrainRWD |
Fuel Economy | |
MPG City20 | MPG City22 |
MPG Highway24 | MPG Highway29 |
Interior | |
Seating Capacity7 | Seating Capacity5 |
Key Features | |
Navigation SystemStandard | Navigation System |
Sunroof/MoonroofStandard | Sunroof/Moonroof |
Safety | |
Front Crash Overall | Front Crash Overall5 |
Side Crash Overall | Side Crash Overall5 |
Dimensions & Capacity | |
Cargo Space17.4 cu ft | Cargo Space19.4 cu ft |
Curb Weight5467 lbs | Curb Weight3889 lbs |
Height72.4 in | Height64.7 in |
Length205.0 in | Length183.3 in |
Width84.9 in | Width82.5 in |
Wheelbase123.4 in | Wheelbase113.1 in |
Maximum Payload1808 lbs | Maximum Payload1182 lbs |
Number of doors4 | Number of doors4 |
Maximum Towing Capacity7700 lbs | Maximum Towing Capacity3500 lbs |
Overview | ||
MSRP | $76,000 | $43,200 |
Listings | ||
Ratings & Reviews | ||
User reviews | ||
Expert reviews | 8.3 out of 10Read full review | 8.0 out of 10Read full review |
Pros & cons | ||
Summary | The “S” in the 2021 Mercedes-Benz GLS name is meant to connect the SUV to the S-Class flagship sedan. In this sense, the GLS is the S-Class of SUVs, and it delivers on that positioning. The 2021 GLS-Class has three rows of spacious seating, and puts comfort above all else. The GLS can hold groceries, weekend bags, antique desks purchased from a roadside consignment shop—all things that would require a lot of negotiating in the S-Class sedan. The GLS is one member of a growing fraternity of full-size, three-row, luxury SUVs. Their ranks include the Cadillac Escalade, Lincoln Navigator, Infiniti QX80, and the more recent BMW X7. The GLS sets itself apart with a higher standard of luxury, and impressive performance… if you’re willing to shell out the cash. | The modern compact luxury SUV market is an embarrassment of riches. Shoppers have more options than ever before, and all of them are terrific vehicles. There’s the BMW X3, Audi Q5, Volvo XC60, Acura RDX, Alfa Romeo Stelvio, and even the newcomer Lincoln Corsair. Not to be left out of this dizzying list is one of the segment’s most popular options, the 2021 Mercedes-Benz GLC. While the X3 arguably kicked off the small luxury SUV craze, the bar was raised with the GLC’s predecessor, the GLK. But even the GLK felt like a stopgap compared to a fully realized vehicle like the GLC. It encapsulates everything that buyers are looking for in a compact luxury SUV—an upscale cabin, cutting-edge infotainment and safety technology, and driving dynamics that are equal parts athletic and comfortable. Many vehicles in the aforementioned list have some or all of these things, but few combine them all as elegantly as the GLC. Mercedes-Benz happily boasts the GLC is its best-seller, and with good reason. But should you count yourself among one of their customers? Read on to find out. |
Video | No video found | |
Popular Features & Specs | ||
Engine | 3.0L 362 hp I6 | 2.0L 255 hp I4 |
Drive Train | AWD | RWD |
Seating Capacity | 7 | 5 |
Horsepower | 362 hp @ 5500 rpm | 255 hp @ 5800 rpm |
MPG City | 20 | 22 |
MPG Highway | 24 | 29 |
Engine | ||
Engine Name | 3.0L 362 hp I6 | 2.0L 255 hp I4 |
Torque | 369 lb-ft @ 1600 rpm | 273 lb-ft @ 1800 rpm |
Horsepower | 362 hp @ 5500 rpm | 255 hp @ 5800 rpm |
Drivetrain | AWD | RWD |
Fuel Economy | ||
MPG City | 20 | 22 |
MPG Highway | 24 | 29 |
Interior | ||
Seating Capacity | 7 | 5 |
Key Features | ||
Navigation System | Standard | |
Sunroof/Moonroof | Standard | |
Safety | ||
Front Crash Overall | 5 | |
Side Crash Overall | 5 | |
Dimensions & Capacity | ||
Cargo Space | 17.4 cu ft | 19.4 cu ft |
Curb Weight | 5467 lbs | 3889 lbs |
Height | 72.4 in | 64.7 in |
Length | 205.0 in | 183.3 in |
Width | 84.9 in | 82.5 in |
Wheelbase | 123.4 in | 113.1 in |
Maximum Payload | 1808 lbs | 1182 lbs |
Number of doors | 4 | 4 |
Maximum Towing Capacity | 7700 lbs | 3500 lbs |
The 2021 Mercedes-Benz GLS, a continuation of the third generation introduced in 2020, was a luxurious full-size SUV that offered a blend of elegance and practicality. Originally launched as the GL-Class in 2006, it was designed to replace the G-Class, but the latter's popularity ensured its survival. The GLS, with its three rows of seating, provided a more comfortable and family-friendly alternative to competitors like the Navigator and Escalade. The exterior design of the GLS was more refined than its predecessors, featuring softened angles and lines that gave it a sleeker appearance. Inside, the GLS boasted a futuristic cabin with a massive digital screen dominating the dashboard, highlighting its tech-centric approach.
In contrast, the 2021 Mercedes-Benz GLC embraced a timeless aesthetic with its soft curves and rounded edges, while still maintaining a modern edge with its LED headlights. The GLC's design was reminiscent of a raised C-Class or E-Class sedan, emphasizing its car-like characteristics. The interior of the GLC was a testament to Mercedes-Benz's commitment to luxury, with a flowing dash and a floating centre touchscreen that set a high standard for compact luxury SUV cabins. The GLC was available in both conventional SUV and crossover "coupe" body styles, with the latter offering a more stylish look at the expense of cargo space.















The 2021 Mercedes-Benz GLS offered a range of powerful engine options. The entry-level GLS 450 was equipped with a twin-turbocharged 3.0-litre inline-six engine, producing 362 horsepower and 369 lb-ft of torque. The GLS 580 4MATIC featured a more robust twin-turbocharged 4.0-litre V8, delivering 483 hp and 516 lb-ft. Both models utilized a nine-speed automatic transmission paired with the 4MATIC all-wheel drive system. The AMG GLS 63, with its hand-crafted 4.0-litre twin-turbo V8, generated an impressive 603 hp and 627 lb-ft of torque. This powerhouse could accelerate from 0 to 100 km/h in just 4.2 seconds, reaching a top speed of 280 km/h. The GLS 63 also featured an adaptive air suspension system, allowing for adjustable ground clearance and precise cornering.
The 2021 Mercedes-Benz GLC 300 came standard with a 2.0-litre turbocharged four-cylinder engine, producing 255 horsepower and 273 lb-ft of torque. This engine was paired with a nine-speed automatic transmission and 4MATIC all-wheel drive. The GLC offered a balanced driving experience, with precise steering and a responsive powertrain. For those seeking more power, the AMG GLC 43 featured a twin-turbocharged V6 with 385 horsepower, while the AMG GLC 63 S boasted a twin-turbo V8 producing 503 hp, offering sports car-like performance.
The 2021 Mercedes-Benz GLS provided ample interior space with three rows of seating, accommodating up to seven passengers. The front and second-row seats offered generous headroom and legroom, while the third row was suitable for adults. The GLS excelled in cargo space, offering 355 litres behind the third row, expanding to 1,209 litres with the third row folded, and a total of 2,400 litres with both the second and third rows down. The interior featured numerous storage compartments, including spacious in-door bins and a centre console with butterfly doors.
The 2021 Mercedes-Benz GLC, in its conventional SUV form, offered 1,600 litres of cargo space with the rear seats folded, and 550 litres with them up. The GLC Coupe's cargo capacity was slightly reduced due to its fastback design, providing 1,400 litres with the seats down and 500 litres with them up. The GLC's interior was well-designed, with a decently sized centre console and deep door pockets for storage. The rear seats provided adequate legroom, although the Coupe's low roofline limited headroom.
The 2021 Mercedes-Benz GLS featured the MBUX infotainment system, which included a large touchscreen and a trackpad for navigation. The system supported Apple CarPlay and Android Auto, though a USB-C cable was required for connectivity. The MBUX system also offered advanced voice control, allowing for complex commands. The digital dash extended to the instrument panel, both controlled by touch-sensitive pads on the steering wheel, providing a customizable and tech-savvy experience.
The 2021 Mercedes-Benz GLC, equipped with the Premium Package, also featured the MBUX infotainment system with a 10.25-inch touchscreen and a touch controller. The system was intuitive, offering both touchscreen and controller options for navigation. The steering wheel included touch-sensitive pads for controlling the digital instrument panel and infotainment screen. The system supported Apple CarPlay and Android Auto, though switching between the GLC's radio and smartphone apps required navigating through menus.
The 2021 Mercedes-Benz GLS came standard with a comprehensive suite of driver-assistance features, including Active Brake Assist, rain-sensing wipers, and automatic high beams. Additional safety options included lane-change assist, adaptive cruise control, and blind spot monitoring. The GLS was equipped with a full array of airbags, traction control, and a tire-pressure monitoring system.
The 2021 Mercedes-Benz GLC offered advanced safety features through the Intelligent Drive Package, which included automatic emergency braking, forward collision warning, and blind-spot monitoring. Parking sensors and hands-free parking assist were part of the Premium Plus Package. However, the parking sensors were noted to be overly sensitive, potentially causing distractions.
CarGurus highlights

According to CarGurus experts, the overall rating for the 2021 Mercedes-Benz GLS was 8.3 out of 10, while the 2021 Mercedes-Benz GLC scored 8.0 out of 10. Based on these ratings, the GLS is the recommended choice for those seeking a more spacious and powerful luxury SUV with advanced features.
Choose the 2021 Mercedes-Benz GLC if:
- You prefer a compact luxury SUV with a stylish design and car-like characteristics.
- You value a well-crafted interior with intuitive technology features.
- You seek a balance of performance and practicality in a smaller package.
Choose the 2021 Mercedes-Benz GLS if:
- You need a spacious SUV with three rows of seating and ample cargo capacity.
- You desire a powerful engine lineup, including a high-performance AMG variant.
- You appreciate advanced technology and a luxurious interior.
CarGurus highlights

According to CarGurus experts, the overall rating for the 2021 Mercedes-Benz GLS was 8.3 out of 10, while the 2021 Mercedes-Benz GLC scored 8.0 out of 10. Based on these ratings, the GLS is the recommended choice for those seeking a more spacious and powerful luxury SUV with advanced features.
Choose the 2021 Mercedes-Benz GLC if:
Shop Now- You prefer a compact luxury SUV with a stylish design and car-like characteristics.
- You value a well-crafted interior with intuitive technology features.
- You seek a balance of performance and practicality in a smaller package.
Choose the 2021 Mercedes-Benz GLS if:
Shop Now- You need a spacious SUV with three rows of seating and ample cargo capacity.
- You desire a powerful engine lineup, including a high-performance AMG variant.
- You appreciate advanced technology and a luxurious interior.

By: CarGurus + AI
At CarGurus, our team of experienced automotive writers remain at the heart of our content operation, conducting hands-on car tests and writing insightful guides that are backed by years of industry experience. To complement this, we are harnessing AI to make our content offering more diverse and more helpful to shoppers than ever. To achieve this, our AI systems are based exclusively on CarGurus content, ratings and data, so that what we produce is both unique to CarGurus, and uniquely helpful to car shoppers.








































