Compare the2023 Mercedes GLC CoupeVS 2023 Cadillac XT4

For enhanced safety, the front and rear seat shoulder belts of the Mercedes GLC Coupe have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Cadillac XT4 doesn’t offer pretensioners for its rear seat belts.

The GLC Coupe’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The XT4 doesn’t offer pre-crash pretensioners.

The GLC Coupe has standard NECK-PRO front head restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the NECK-PRO front head restraints system moves the headrests forward to prevent neck and spine injuries. The XT4 doesn’t offer a whiplash protection system.

The GLC Coupe offers an optional Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The XT4 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the GLC Coupe. But it costs extra on the XT4.

Both the GLC Coupe and XT4 have rear cross-traffic warning, but the GLC Coupe has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The XT4’s Rear Cross Traffic Alert doesn’t automatically brake.

The GLC Coupe’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 XT4 doesn’t offer a driver alert monitor.

Both the GLC Coupe and the XT4 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, blind spot warning systems, rearview cameras, rear cross-path warning and available lane departure warning systems.

The GLC Coupe’s 2.0 turbo 4-cylinder produces 20 more horsepower (255 vs. 235) and 15 lbs.-ft. more torque (273 vs. 258) than the XT4’s 2.0 turbo 4-cylinder.

As tested in Motor Trend the Mercedes GLC Coupe is faster than the Cadillac XT4:

The GLC Coupe has 1.5 gallons more fuel capacity than the XT4 FWD’s standard fuel tank (17.4 vs. 15.9 gallons), for longer range between fill-ups. The GLC Coupe has 1.1 gallons more fuel capacity than the XT4 AWD’s standard fuel tank (17.4 vs. 16.3 gallons).

The GLC Coupe has a standard locking fuel door which locks and unlocks with the power locks The fuel filler door is not lockable on the XT4. A locking fuel door helps prevent fuel theft and vandalism, such as sugar in the tank.

For better stopping power the GLC Coupe’s brake rotors are larger than those on the XT4:

For better traction, the GLC Coupe’s optional tires are larger than the largest tires available on the XT4 (F:255/45R20 & R:285/40R20 vs. 245/45R20).

The GLC Coupe’s standard tires provide better handling because they have a lower 55 series profile (height to width ratio) that provides a stiffer sidewall than the XT4’s standard 60 series tires. The GLC Coupe’s optional 285/40R20 rear tires have a lower 40 series profile than the XT4’s optional 45 series tires.

For better ride, handling and brake cooling the GLC Coupe has standard 19-inch wheels. Smaller 18-inch wheels are standard on the XT4.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the GLC Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The XT4 doesn’t offer run-flat tires.

The GLC Coupe’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 XT4 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLC Coupe’s wheelbase is 3.7 inches longer than on the XT4 (113.1 inches vs. 109.4 inches).

The GLC Coupe has .3 inches more front shoulder room and 1.4 inches more rear shoulder room than the XT4.

For enhanced passenger comfort on long trips the GLC Coupe’s rear seats recline. The XT4’s rear seats don’t recline.

The GLC Coupe has a larger cargo volume with its rear seat folded than the XT4 with its rear seat folded (49.4 vs. 48.9 cubic feet).

The GLC Coupe’s cargo area is larger than the XT4’s in almost every dimension:

Pressing a switch automatically lowers the GLC Coupe’s rear seats, to make changing between passengers and cargo easier. The XT4 doesn’t offer automatic folding seats.

The GLC Coupe’s standard towing capacity is much higher than the XT4’s (3500 vs. 2500 pounds).

The engine in the GLC Coupe is mounted longitudinally (North-South), instead of sideways, as in the XT4. This makes it easier to service and maintain, because the accessory belts are in front.

Unlike the driver-only memory system in the XT4 Premium Luxury/Sport, the GLC Coupe offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The GLC Coupe’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The XT4’s rear power window switches have to be held the entire time to close them fully.

If the windows are left open on the GLC Coupe 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 XT4 can only close the windows from inside the vehicle, with the ignition on.

The GLC Coupe’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The XT4 Luxury’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Heated windshield washer nozzles are standard on the GLC Coupe to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The XT4 doesn’t offer heated windshield washer nozzles.

The XT4 (except Luxury)’s optional cornering lamps activate a lamp on the front corner when the turn signal is activated. The GLC Coupe’s optional adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

Manual rear side window sunshades are available in the GLC Coupe to help block heat and glare for the rear passengers. The XT4 doesn’t offer rear side window sunshades.

The GLC Coupe 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 XT4 doesn’t offer a house-current electrical outlet.

According to The Car Book by Jack Gillis, the GLC Coupe is less expensive to operate than the XT4 because it costs $191 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the GLC Coupe than the XT4, including $111 less for a muffler and $680 less for a timing belt/chain.

Motor Trend selected the GLC Coupe as their 2017 Sport Utility of the Year. The XT4 has never been chosen.

The Mercedes GLC outsold the Cadillac XT4 by over three to one during 2022.