Compare the2025 Mercedes G-ClassVS 2024 Porsche Cayenne Coupe

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

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the G-Class are reminded to check the back seat if they opened the rear door before starting out. The Cayenne Coupe doesn’t offer a back seat reminder.

The G-Class’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Cayenne Coupe doesn’t offer a driver alert monitor.

Both the G-Class and the Cayenne Coupe have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras and rear cross-path warning.

There are almost 2 times as many Mercedes dealers as there are Porsche dealers, which makes it much easier should you ever need service under the G-Class’ warranty.

The G-Class has more powerful engines than the Cayenne Coupe:

The G 580 can travel with zero emissions for 239 miles. The Cayenne Coupe can’t move without running its internal combustion engine.

An engine control system that can shut down some of the engine’s cylinders helps improve the G-Class AMG 63’s fuel efficiency. The Cayenne Coupe doesn’t offer a system that can shut down part of the engine.

The G-Class has 7.9 gallons more fuel capacity than the Cayenne Coupe S E-Hybrid/Turbo E-Hybrid’s standard fuel tank (26.4 vs. 18.5 gallons), for longer range between fill-ups. The G-Class has 2.7 gallons more fuel capacity than the Cayenne Coupe’s standard fuel tank (26.4 vs. 23.7 gallons).

The U.S. Environmental Protection Agency (EPA) certifies the Mercedes G-Class at emission levels ranging from “Ultra Low Emissions Vehicle” (ULEV) to “Super Ultra Low Emissions Vehicle” (SULEV). The Porsche Cayenne Coupe is only certified to “Ultra Low Emissions Vehicle” (ULEV) standards.

A nine-speed automatic is standard on the Mercedes G-Class, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Cayenne Coupe.

In an emergency stopping situation, many drivers don’t press the brakes with enough force to stop the vehicle in the shortest distance. The G-Class has standard Brake Assist to detect emergency braking situations (by how hard and how quickly the brake pedal is pressed) and then automatically apply maximum braking immediately in order to help prevent a collision. The Cayenne Coupe doesn’t offer a brake assist feature.

For better traction, the G-Class has larger standard tires than the Cayenne Coupe (265/60R18 vs. 255/55R20). The G-Class’ optional tires are larger than the largest tires available on the Cayenne Coupe (295/40R22 vs. 285/45R21).

The G-Class has a standard full size spare (not available on 580) so a flat doesn’t interrupt your trip. A full size spare isn’t available on the Cayenne Coupe; it requires you to depend on a temporary spare, which has mileage and speed limitations, or roadside assistance and a tow-truck.

The G-Class’ front to rear weight distribution is more even (53% to 47%) than the Cayenne Coupe’s (56.8% to 43.2%). This gives the G-Class more stable handling and braking.

For greater off-road capability the G-Class has a 1.3 inches greater minimum ground clearance than the Cayenne E-Hybrid Coupe (9.5 vs. 8.2 inches), allowing the G-Class to travel over rougher terrain without being stopped or damaged. The G 580’s minimum ground clearance is .3 inch higher than on the Cayenne Turbo E-Hybrid Coupe (9.8 vs. 9.5 inches).

The G 550 is 12 inches shorter than the Cayenne Coupe, making the G-Class easier to handle, maneuver and park in tight spaces.

The G-Class has 3.7 inches more front headroom, 2.2 inches more rear headroom and .9 inches more rear shoulder room than the Cayenne Coupe.

The G-Class has a much larger cargo volume with its rear seat up than the Cayenne Coupe with its rear seat up (34.8 vs. 20.9 cubic feet). The G-Class has a much larger cargo volume with its rear seat folded than the Cayenne Coupe with its rear seat folded (68.6 vs. 53 cubic feet).

The G-Class 580 can be flat towed on all four wheels (dinghy towed), allowing recreational vehicle owners to bring it with them on the road. When they reach their destination, the G-Class can be unhitched and driven around locally. The Cayenne Coupe can’t be towed flat on the ground.

The G-Class has a much higher standard payload capacity than the Cayenne Coupe (1235 vs. 853 lbs.).

The G-Class has a higher maximum payload capacity than the Cayenne Coupe (1576 vs. 1501 lbs.).

The G-Class 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 Cayenne Coupe doesn’t offer a remote starting system.

The G-Class’ power window, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The Cayenne Coupe’s cruise control switches are unlit, making them difficult to find at night and operate safely.

To improve rear visibility by keeping the rear window clear, the G-Class has a standard rear wiper. The Cayenne Coupe doesn’t offer a rear wiper.

The G-Class has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the vehicle heater warms up. A heated steering wheel costs extra on the Cayenne Coupe.