Compare the2023 Mercedes GLEVS 2023 Porsche Cayenne Coupe

The GLE’s 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.

The GLE has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the Cayenne Coupe’s blind spot costs extra.

To help make backing out of a parking space safer, the GLE’s standard Rear Cross-Traffic Alert uses sensors in the rear to alert the driver to vehicles approaching from the side and Active Brake Assist automatically engages the brakes to help avoid a collision. The Cayenne Coupe doesn’t offer a rear cross-path warning system.

The GLE’s 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 GLE and the Cayenne Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems and around view monitors.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, with its optional vehicle-to-vehicle front crash prevention system, with its optional vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the GLE its highest rating: “Top Safety Pick Plus” for 2022, a rating granted to only 128 vehicles tested by the IIHS. The Cayenne Coupe has not been tested, yet.

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 GLE’s warranty.

J.D. Power and Associates’ 2022 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Porsche vehicles. With 11 fewer problems per 100 vehicles, JD Power ranks Mercedes higher than Porsche.

On the EPA test cycle the GLE gets better mileage than the Cayenne Coupe running its gasoline engine:

The GLE has 2.7 gallons more fuel capacity than the Cayenne Coupe E-Hybrid’s standard fuel tank (22.5 vs. 19.8 gallons), for longer range between fill-ups.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes GLE higher (5 to 6 out of 10) than the Porsche Cayenne Coupe (3 to 5). This means the GLE produces up to 23.4 pounds less smog-producing pollutants than the Cayenne Coupe every 15,000 miles.

A nine-speed automatic is standard on the Mercedes GLE, 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 GLE 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.

The GLE’s 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 Cayenne Coupe doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLE’s wheelbase is 3.9 inches longer than on the Cayenne Coupe (117.9 inches vs. 114 inches).

The GLE’s front to rear weight distribution is more even (53.5% to 46.5%) than the Cayenne Coupe’s (55.9% to 44.1%). This gives the GLE more stable handling and braking.

The design of the Mercedes GLE amounts to more than styling. The GLE has an aerodynamic coefficient of drag of .29 Cd. That is significantly lower than the Cayenne Coupe (.34 to .35) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the GLE get better fuel mileage.

As tested by Car and Driver, the interior of the GLE 450 is quieter than the Cayenne Turbo GT:

The GLE offers optional seating for 7 passengers; the Cayenne Coupe can only carry up to 5.

The GLE has 2.3 inches more front headroom, .2 inches more front shoulder room, 1.3 inches more rear headroom, .9 inches more rear legroom and 1.8 inches more rear shoulder room than the Cayenne Coupe.

The GLE has a much larger cargo volume with its rear seat up than the Cayenne Coupe with its rear seat up (33.3 vs. 22 cubic feet). The GLE has a much larger cargo volume with its rear seat folded than the Cayenne Coupe with its rear seat folded (74.9 vs. 54.3 cubic feet).

A control in the cargo area automatically lowers the GLE’s second row seats, to make changing between passengers and cargo easier. The Cayenne Coupe doesn’t offer automatic folding seats.

The GLE 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 GLE’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. An easy entry system costs extra on the Cayenne Coupe.

If the windows are left open on the GLE the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Cayenne Coupe can only operate the windows from inside the vehicle, with the ignition on.

The GLE’s power window, power lock, 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 GLE has a standard rear wiper. The Cayenne Coupe doesn’t offer a rear wiper.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the GLE has standard extendable sun visors. The Cayenne Coupe doesn’t offer extendable visors.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes GLE has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the Cayenne Coupe.

The GLE offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Cayenne Coupe doesn’t offer a house-current electrical outlet.

The GLE is available in both rear-wheel drive and four-wheel drive configurations. The Cayenne Coupe doesn’t offer a two-wheel drive configuration.

Insurance will cost less for the GLE owner. The Complete Car Cost Guide estimates that insurance for the GLE will cost $3855 less than the Cayenne Coupe over a five-year period.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes GLE will be $16459 to $72610 less than for the Porsche Cayenne Coupe.

The Mercedes GLE outsold the Porsche Cayenne by over four to one during 2022.