Doug DeMuro gave the 2021 Mercedes-Benz GLS Maybach a score of 71/100, reflecting a positive overall assessment despite some notable trade-offs. The vehicle excels in design and performance, particularly highlighting its exceptional air suspension bounce feature that can sustain bouncing for extended periods, complemented by a luxurious leather headliner interior. However, the suspension's bouncing motion creates a significant livability drawback, with rear seat occupants experiencing nausea from the feature that works better as a party trick than for its theoretical off-road sand-recovery purpose. The GLS Maybach is best suited for buyers who prioritize luxury, quirky engineering features, and air suspension technology over passenger comfort on longer drives.

SavageGeese gives the 2024 Mercedes-Benz GLS 63 AMG a mixed review with an OctaneScore of 51/100, praising its potent performance and distinctive styling but questioning its value proposition. The standout strengths are its impressive 603-hp biturbo V8 engine with EQ Boost delivering 0-60 mph in 4.1 seconds, its aggressive "Big Pimpin'" design with optional 23-inch wheels, and premium cabin comfort featuring heated/cooled massaging seats and full leather. However, SavageGeese warns that the interior technology feels dated compared to competitors, steering lacks nimbleness, the V8 becomes problematic when repairs are needed, and at $145,000-$160,000, the GLS is difficult to justify when the BMW X7 offers comparable refinement for nearly $50,000 less. This SUV is designed exclusively for wealthy buyers seeking ostentatious performance and status rather than practical value or technological leadership.

Redline Reviews gives the 2024 Mercedes-Benz GLS 450 4Matic a solid positive rating of 81/100, praising its cabin technology and fuel economy as standout strengths—the 13-speaker Burmester stereo and touch-sensitive steering wheel controls are highlighted as premium features, while the 48-volt mild hybrid system delivers respectable 19/24 mpg figures and 500 miles of range. The SUV also impresses with its spacious livability (205 inches long with 17.4 cubic feet of cargo space all three rows up) and strong performance (375 hp, 0-60 in 5.8 seconds), though the reviewer notes concerning value dynamics: the base price has jumped $10,000 over three years to $87,000, and premium upgrades like the $6,500 E-Active Body Control suspension are limited to higher trims. The GLS is best suited for buyers who prioritize premium cabin features, technology, and practical three-row space over competitive pricing in the luxury SUV segment.

SavageGeese gave the 2024 Mercedes GLS 580 a positive 66/100 rating, praising its genuine three-row livability for larger families, impressive highway fuel economy (22 mpg), and refined V8 engine that significantly enhances drivability compared to six-cylinder alternatives. However, the vehicle stumbles with outdated infotainment that forces constant menu jumping, poor start-stop implementation, and jerky adaptive cruise control that overreacts during highway braking. The GLS 580 is best suited for buyers seeking a comfortable, fuel-efficient luxury three-row SUV who can overlook frustrating cabin technology and driving assistance systems in exchange for the V8's refinement and usable interior space.