2021 Mercedes-Benz GLC vs 2021 Mercedes-Benz GLS

The third generation of the Mercedes-Benz GLS-Class, introduced in 2020 and carried over to 2021, evolved from the GL-Class, which debuted in 2006. Initially intended to replace the G-Class, the GL-Class instead found its niche among practical yet affluent buyers, offering a luxurious, family-friendly alternative to the Navigator and Escalade. The GLS, with its softened angles and lines, appeared less bulky than its predecessors. Inside, it boasted a futuristic cabin dominated by a massive digital screen spanning nearly two-thirds of the dash, emphasizing its tech-centric controls. Available in three trims—GLS 450, GLS 580, and the high-performance AMG GLS 63—the GLS offered a range of standard features, including remote keyless entry, nine USB ports, dual-zone climate control, and a 13-speaker Burmester sound system. Various option packages added further luxury and convenience, while the AMG GLS 63 stood out with aggressive styling and performance-inspired interior touches.

The 2021 Mercedes-Benz GLC, in contrast, embraced a timeless aesthetic with soft curves and rounded edges, avoiding the aggressive styling trend of many contemporary SUVs. Its long hood and wide grille gave it a dramatic stance, reminiscent of a raised C-Class or E-Class sedan, underscoring its car-like characteristics. The GLC's cabin was a masterpiece of automotive design, with flowing lines and a floating center touchscreen. Mercedes' move towards larger screens and a minimalist approach was evident, but the GLC's interior remained a benchmark for compact luxury SUVs. Available in both conventional SUV and crossover "coupe" body styles, the GLC offered standard features like 18-inch alloy wheels, LED headlights, synthetic leather upholstery, and the MBUX infotainment system. Optional packages and upgrades added navigation, premium sound, and various comfort features, while the AMG GLC43 and AMG GLC63 models provided enhanced performance and sportier styling.

The 2021 Mercedes-Benz GLS offered a range of powerful engines. The entry-level GLS 450 featured a twin-turbocharged 3.0-liter inline-six engine producing 362 horsepower and 369 pound-feet of torque. The GLS 580 upgraded to a twin-turbocharged 4.0-liter V8 with 483 hp and 516 lb-ft. Both models used a nine-speed automatic transmission and Mercedes' 4MATIC all-wheel drive system. The AMG GLS 63, with its hand-crafted 4.0-liter twin-turbo V8, delivered an impressive 603 hp and 627 lb-ft of torque, paired with a nine-speed AMG twin-clutch automatic transmission. All engines included Mercedes' EQ Boost 48-volt mild-hybrid system, adding an extra 21 hp and 184 lb-ft of torque when needed. The AMG GLS 63 could accelerate from 0 to 60 mph in just 4.1 seconds, with a top speed of 174 mph. Its adaptive air suspension and multiple drive modes, including Comfort, Sport, and Sport+, provided a versatile and dynamic driving experience.

The 2021 Mercedes-Benz GLC 300 came standard with a 2.0-liter turbocharged four-cylinder engine, producing 255 horsepower and 273 pound-feet of torque, mated to a nine-speed automatic transmission with rear-wheel drive or optional 4MATIC all-wheel drive. The GLC featured steering-wheel-mounted paddle shifters and Dynamic Select drive modes, including Eco, Comfort, Sport, and Sport+. The GLC 300's powertrain was generally responsive, with occasional lag from a stop, but it struck a balance between refinement and performance. For those seeking more power, the AMG GLC43 offered a twin-turbocharged V6 with 385 hp, while the AMG GLC63 models featured a twin-turbo V8, producing 469 hp in the 63 and 503 hp in the 63 S. These AMG models delivered sports car-like acceleration and handling, making them standout performers in the compact luxury SUV segment.

The 2021 Mercedes-Benz GLS provided three rows of spacious seating, with ample headroom and legroom for first- and second-row occupants. Standard seven-passenger seating could be reduced to six with optional second-row captain's chairs. The third row, while less spacious, was still suitable for adults. The GLS offered 17.4 cubic feet of cargo space behind the third row, expanding to 42.7 cubic feet with the third row folded, and 87.4 cubic feet with both the second and third rows folded. The power-folding third row and numerous storage compartments added to its practicality.

The 2021 Mercedes-Benz GLC, in its conventional SUV form, provided 56.5 cubic feet of cargo space with the rear seats folded, and 19.4 cubic feet with the seats up. The GLC Coupe's fastback profile reduced these figures to 49.4 and 17.6 cubic feet, respectively. The GLC's interior featured a decently sized center console, deep door pockets, and retractable cupholders. Rear-seat space was adequate, with good legroom and headroom in the SUV, though the Coupe's low roofline compromised headroom. Overall, the GLC made efficient use of its interior space, offering practical storage solutions and comfortable seating.

The 2021 Mercedes-Benz GLS came standard with the MBUX infotainment system, featuring a massive touchscreen that spanned nearly two-thirds of the dash. The system included a trackpad controller, Apple CarPlay, and Android Auto, though a USB-C cable was required for connectivity. The MBUX system's voice control, activated by saying "Hey Mercedes," could understand complex commands. The digital dash extended to the fully-digital instrument panel, both controlled by touch-sensitive pads on the steering wheel. This setup allowed for customization and ease of use, though it required some acclimation.

The 2021 Mercedes-Benz GLC also featured the MBUX infotainment system, with a 10.25-inch center touchscreen and a touch controller. The system was intuitive, offering both touch and controller options for navigating menus. The steering wheel's touch-sensitive pads allowed for customization of the digital instrument panel and navigation of the main infotainment screen. Apple CarPlay and Android Auto were included, though switching between the GLC's radio and smartphone apps required navigating through menus. Despite this minor inconvenience, the MBUX system in the GLC was user-friendly and advanced.

The 2021 Mercedes-Benz GLS came standard with a comprehensive suite of driver-assistance features, including Active Brake Assist, forward-collision avoidance, rain-sensing wipers, blind-spot monitoring, and automatic high beams. Additional standard safety features included automatic parking assist, a surround-view camera system, a driver-drowsiness monitor, and crosswind assist. Optional safety tech included lane-keep assist, lane-change assist, adaptive cruise control, and stop-and-go cruise control. The GLS also featured a full array of airbags, traction control, self-tensioning seatbelts, and a tire-pressure monitoring system.

The 2021 Mercedes-Benz GLC was equipped with standard safety features such as automatic emergency braking, forward collision warning, blind-spot monitoring, and rear cross-traffic alert. Other standard features included front- and rear parking sensors, hands-free parking assist, and a driver drowsiness monitor. The parking and proximity sensors were noted to be overly sensitive, but could be deactivated. Optional safety features included a 360-degree parking camera, dynamic cruise control, automatic high beams, and lane departure warning. The GLC's safety tech was comprehensive, though some features were optional.