2019 Mercedes GLS vs. 2019 Rolls-Royce Cullinan

Detailed Review, Specifications & Comparison

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The GLS’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Cullinan doesn’t offer pre-crash pretensioners.

Both the GLS and the Cullinan have standard driver and passenger frontal airbags, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, driver alert monitors, available night vision systems, lane departure warning systems, blind spot warning systems and around view monitors.


The GLS’ corrosion warranty is 1 year longer than the Cullinan’s (5 vs. 4 years).

There are almost 11 times as many Mercedes dealers as there are Rolls-Royce dealers, which makes it much easier should you ever need service under the GLS’ warranty.


The AMG GLS 63’s standard 5.5 turbo V8 produces 14 more horsepower (577 vs. 563) than the Cullinan’s 6.8 turbo V12.

Fuel Economy and Range

On the EPA test cycle the GLS gets better fuel mileage than the Cullinan




3.0 Turbo V6

16 city/22 hwy

4.7 Turbo V8

14 city/19 hwy



6.8 Turbo V12

12 city/20 hwy

In heavy traffic or at stoplights the GLS’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Cullinan doesn’t offer an automatic engine start/stop system.


For more complete vehicle control the GLS has Touch Shift, with the available convenience of an automatic transmission and the complete gear control of a manual transmission without the inconvenience of a clutch. Touch Shift allows the driver to eliminate unwanted shifts and maximize engine braking by down shifting while cornering. The Cullinan doesn’t offer a transmission that allows complete gear control.

A nine-speed automatic is available on the Mercedes GLS, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Cullinan.

Suspension and Handling

The GLS’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Cullinan doesn’t offer drift compensation steering.

For better maneuverability, the GLS’ turning circle is 2.7 feet tighter than the Cullinan’s (40.7 feet vs. 43.4 feet).


The Mercedes GLS may be more efficient, handle and accelerate better because it weighs about 300 to 750 pounds less than the Rolls-Royce Cullinan.

The GLS is 8.3 inches shorter than the Cullinan, making the GLS easier to handle, maneuver and park in tight spaces.

For excellent aerodynamics, the GLS has standard flush composite headlights. The Cullinan has recessed headlights that spoil its aerodynamic shape and create extra drag.

Passenger Space

The GLS has standard seating for 7 passengers; the Cullinan can only carry up to 5.

The GLS has 31.6 cubic feet more passenger volume than the Cullinan (143.6 vs. 112).

Cargo Capacity

The GLS’ cargo area provides more volume than the Cullinan.



Third Seat Folded

49.4 cubic feet


Third Seat Removed


43.4 cubic feet

Second Seat Folded

93.8 cubic feet

68.2 cubic feet

The GLS’ standard rear seats fold to accommodate long and bulky cargo. The Cullinan w/Executive Rear Seats doesn’t offer folding rear seats.

The GLS’ liftgate lifts up in one piece, completely out of the way of loading and unloading, while sheltering the cargo loading area. The Cullinan’s tailgate’s top part raises up, but the bottom part lowers, getting in the way of loading and making an uneven surface for sliding cargo.


The GLS has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The Cullinan doesn’t offer a remote starting system.

Heated windshield washer fluid is optional on the GLS to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The Cullinan doesn’t offer heated windshield washer fluid.

To keep a safe, consistent following distance, the GLS offers an optional Active Distance Assist DISTRONIC, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The Cullinan doesn’t offer an adaptive cruise control.

The GLS’ optional Active Parking Assist can parallel park by itself, with the driver only controlling speed with the brake pedal. The Cullinan doesn’t offer an automated parking system.


The GLS was chosen as one of Car and Driver’s “Top Five/10Best Trucks” for 3 of the last 3 years. The Cullinan has never been a Car and Driver “Top Five/10Best Truck” pick.

Motor Trend selected the GLS as their 2013 Sport Utility of the Year. The Cullinan has never been chosen.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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