The 2021 Mercedes-Benz GLS 450 stands as a beacon of luxury and capability in the competitive three-row SUV market. As Mercedes-Benz’s flagship SUV, the GLS 450 received a significant redesign in the previous year, cementing its position as a top contender. For 2021, the introduction of the high-performance AMG GLS 63 model further broadened the appeal of the GLS lineup, showcasing Mercedes-Benz’s commitment to pushing boundaries. While the market offers numerous luxury three-row SUVs, few can rival the GLS 450’s blend of opulent comfort, cutting-edge technology, and refined performance.
Pros
- Unmatched comfort and spacious seating for adults in all three rows
- Abundance of advanced technology and safety features
- Responsive engine and composed handling that belie its size
- Versatile cargo capacity
Cons
- Some interior controls are less intuitive due to their small size
What’s New for the 2021 Mercedes-Benz GLS 450?
- Introduction of the high-performance AMG GLS 63 model
- Minor adjustments to standard equipment
2021 Mercedes GLS 450 Overview
The 2021 Mercedes Gls 450 is not just a large SUV; it’s a statement of sophistication and practicality. It has consistently achieved top rankings thanks to its exceptional luxury, refined driving dynamics, and state-of-the-art technology. The GLS 450 is designed to cater to families and individuals who demand both space and premium features without compromising on performance.
Cost to Drive the 2021 Mercedes-Benz GLS 450
For prospective owners considering the cost of ownership, the 2021 Mercedes-Benz GLS 450 4MATIC presents a competitive picture within its class. Based on estimations for North Dakota, with premium unleaded gasoline at $3.85 per gallon, the monthly fuel cost is around $221. This is closely aligned with the average monthly fuel cost for large SUVs in the same region, estimated at $227.
The GLS 450 excels in providing a genuinely comfortable and spacious environment for up to seven adults, making it an ideal choice for families or executive transport. The introduction of the AMG GLS 63 variant underscores the breadth of the GLS range, catering to those seeking ultimate performance alongside luxury. For a comprehensive understanding, delve into our expert analysis of the 2021 GLS 450 below.
Edmunds Expert Rating: 2021 Mercedes GLS 450
Great
8.6 out of 10
edmunds TESTED
The 2021 Mercedes GLS 450 immediately impresses with its remarkable fusion of comfort, performance, and technology. It elevates the qualities admired in the highly-rated GLE SUV, presenting them in a larger, more commanding package. Indeed, the GLS 450 is arguably one of the most comprehensively accomplished vehicles available today.
Rated by America’s best test team.
Performance of the 2021 Mercedes GLS 450
8.5/10
How does the 2021 Mercedes GLS 450 perform on the road? The performance figures of the GLS 450 are genuinely remarkable, suggesting a vehicle that is far smaller and more agile than its actual size. In Edmunds testing, the GLS 450 accelerated from 0 to 60 mph in just 6.2 seconds. This acceleration is more than sufficient for a luxury SUV equipped with a base engine, providing ample power for any driving scenario. The mild-hybrid system integrated into the engine contributes to both enhanced performance and improved fuel efficiency, while ensuring exceptionally smooth power delivery. A minor drawback noted was occasional minor transmission hiccups. Braking performance is equally impressive, with stops from 60 mph achieved in a mere 105 feet, a distance typically associated with performance cars, and among the best in the SUV category. This exceptional braking is partly attributable to the no-cost summer tires equipped on the test vehicle, which also contribute to substantial lateral grip. The steering is light and responsive, making the GLS 450 surprisingly easy to maneuver in tight parking spaces and congested traffic.
Comfort in the 2021 Mercedes GLS 450
8.5/10
In terms of ride comfort, the 2021 Mercedes GLS 450 sets a new benchmark. Mercedes-Benz has truly excelled in creating a supremely comfortable on-road experience. The seats are exceptionally supportive and offer extensive adjustability, including optional massage functions to enhance comfort during long journeys. The heated and ventilated seats operate efficiently, and the automatic climate control system rapidly stabilizes cabin temperature. External noise intrusion is minimal, with only slight road noise perceptible on rough road surfaces. The optional E-Active Body Control suspension significantly elevates ride quality. It delivers a smooth and composed ride, effectively absorbing most road imperfections without inducing excessive body roll or float. Despite the typical compromise in ride quality associated with larger wheels in many SUVs, the GLS 450 test vehicle, equipped with optional 21-inch wheels, maintained excellent ride comfort.
Interior Design and Quality of the 2021 Mercedes GLS 450
9/10
The interior of the 2021 Mercedes GLS 450 is outstanding in virtually every aspect. The driving position is elevated and commanding, yet the driver remains comfortably integrated within the vehicle. All three rows offer generous space, with the third row comfortably accommodating adults over 6 feet tall, facilitated by easy access. Large windows enhance all-around visibility and create a less confined atmosphere for rear passengers. The placement of controls is logical and within easy reach, though the sheer number of controls and small text size may initially require the driver to divert attention from the road until familiarity develops. The separation of seat controls between the door panel and the infotainment system is a minor inconvenience.
Technology and Innovation in the 2021 Mercedes GLS 450
9.5/10
The technology suite in the 2021 Mercedes GLS 450 is a standout feature, setting a new benchmark in the luxury SUV class, even if its comprehensive nature entails a steeper learning curve initially. The navigation system is particularly noteworthy, featuring an augmented reality overlay and turn-by-turn directions integrated into both the instrument cluster and head-up display. These features present a compelling alternative to smartphone-based navigation apps. However, for those who prefer smartphone integration, Apple CarPlay and Android Auto are standard. Connectivity is abundant with USB-C ports in all three rows, and a standard wireless charging pad is conveniently located in front of the cupholders. The driver assistance technologies are equally impressive. The adaptive cruise control system is among the most effective tested, maintaining a consistent and appropriate following distance in traffic, capable of bringing the GLS 450 to a complete stop and resuming गति as traffic flow resumes.
Storage and Practicality of the 2021 Mercedes GLS 450
8/10
In terms of cargo capacity, the 2021 Mercedes GLS 450 offers up to 84.7 cubic feet of storage with the rear seats folded down. With all seats in the upright position, the cargo area reduces to 17.4 cubic feet, which may be limiting for carrying luggage for all passengers. While cargo space is competitive within its class, it is less than the Lincoln Navigator, which offers a cavernous 103.3 cubic feet with seats folded. The second and third-row seats fold flat and can be conveniently lowered using buttons in the cargo area. Small-item storage is well-considered, with numerous pockets, bins, and cupholders throughout the cabin. The GLS 450 has a towing capacity of 7,700 pounds, surpassing its primary competitor, the BMW X7. However, the Lincoln Navigator again leads in towing capability, rated at 8,300 pounds.
Fuel Efficiency of the 2021 Mercedes GLS 450
8/10
The EPA fuel economy ratings for the 2021 Mercedes GLS 450 are commendable for a vehicle of its size and capability, at 21 mpg combined (19 city/23 highway). In real-world testing, the GLS 450 matched its combined EPA rating of 21 mpg on the evaluation loop. Over extended driving in mixed conditions and with passengers and cargo, the GLS 450 achieved 19 mpg.
Value Proposition of the 2021 Mercedes GLS 450
8/10
The 2021 Mercedes GLS 450 represents a significant investment, but its exceptional build quality justifies its price point. While option packages can quickly escalate the price, the GLS 450 remains competitively priced within the luxury SUV segment. It offers a comprehensively equipped package that few competitors can match for less. The standard four-year/50,000-mile bumper-to-bumper warranty is typical for the luxury class.
Wildcard Appeal of the 2021 Mercedes GLS 450
8.5/10
The 2021 Mercedes GLS 450 embodies everything expected of a Mercedes-Benz vehicle. Its design is refined and understated, and it is equipped with the latest technological innovations. As a luxury vehicle, it is designed to provide effortless operation, and the engine delivers smooth, ample power. The engine note is also pleasing, particularly under full acceleration. The GLS 450 is easy to drive and offers a genuinely pleasant environment for both short commutes and long journeys.
Edmunds Recommendation: Which 2021 Mercedes GLS 450 Model is Best?
For most buyers, the GLS 450 is the recommended choice. Its six-cylinder engine provides ample power while offering superior fuel efficiency compared to the V8 models. The GLS 450 also offers access to the same range of standard and optional features. The primary justification for considering the V8-powered GLS 580 or AMG GLS 63 would be for those who require substantial towing capability. Regardless of the chosen trim, opting for the Driver Assistance Package Plus is highly recommended, as it includes desirable features such as adaptive cruise control and enhanced safety systems.
Compare 2021 Mercedes-Benz GLS-Class trim levels Helpful trims summary and side-by-side comparison chart
2021 Mercedes-Benz GLS-Class Model Lineup
The 2021 Mercedes-Benz GLS-Class is available in three primary models: GLS 450, GLS 580, and AMG GLS 63. Each model is well-equipped with a comprehensive list of standard features, with numerous additional options available. The main differentiator between trim levels is the engine. The ultra-luxury Maybach GLS is reviewed separately by Edmunds. Key feature highlights include:
GLS 450 (Base Trim):
- Turbocharged six-cylinder engine (362 hp)
- Nine-speed automatic transmission
- 4MATIC all-wheel drive
- Adaptive air suspension
- Seven-passenger seating
- Sunroof
- Heated and ventilated front seats
- Adaptive LED headlights
- Customizable ambient lighting
- Four-zone climate control
- MB-Tex simulated leather upholstery
Technological features:
- MBUX infotainment system with dual 12.3-inch displays
- Burmester surround-sound system
- Apple CarPlay and Android Auto integration
- Wireless charging pad
- Nine USB ports
- Navigation system
- Keyless entry and ignition
Standard safety and assistance features:
- Forward collision mitigation
- Blind-spot monitoring
- 360-degree camera system
- Automated parking system
GLS 580 (Upgraded Trim):
- Twin-turbo V8 engine (483 hp)
- Five-zone climate control
- Leather upholstery
- Upgraded multi-contour front seats with massage function
AMG GLS 63 (Performance Trim):
- More powerful twin-turbo V8 engine (603 hp)
- High-performance braking system
- Sport-tuned suspension
- AMG sport seats with badging
- Heated and cooled front cupholders
Optional Packages and Features:
- Driver Assistance Package Plus: Adaptive cruise control, lane keeping assist, evasive steering assist, speed limit assist.
- E-Active Body Control: Advanced suspension system (GLS 580 only).
- Second-row captain’s chairs (six-passenger configuration).
- Executive Rear Seat package (upgraded second-row seating).
- Rapid-heating front seats with heated armrests and door panels.
- Head-up display.
- Acoustic Comfort package (enhanced cabin insulation).
- Upgraded Burmester High-End surround sound system.
- Panoramic sunroof.
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