Mercedes-Benz GLE 450d Coupé 4Matic AMG Line (2026) Review

The GLE 450d Coupé 4Matic AMG Line is Mercedes-Benz’s sloping-roof take on its large luxury SUV, priced at R2 395 267. That positions it neatly between the BMW X6 M60i (R2 295 215) and the Porsche Cayenne S (R2 440 000), while competing directly against the Range Rover Sport P360 Autobiography at R2 425 700. 

• Pros:

  • Exceptional real-world range and fuel economy 

  • Relentless 750 Nm torque delivery from a refined six-cylinder turbodiesel

  • Cavernous boot  

  • Full 5-year/100 000 km warranty and maintenance plan included as standard

  • Striking coupé stance paired with aggressive AMG Line design

• Cons:

  • Lower braked towing capacity (2 700 kg vs 3 500 kg class benchmark)

  • Tapered roofline cuts into rear headroom

  • Straight-line acceleration lags behind the V8-powered BMW X6 M60i and Cayenne S

  • Key luxury items like ventilated seats, HUD, and rear-wheel steer remain on the options list

Styling 

Choosing the Coupé over the standard upright GLE changes the car’s character from family hauler to something sportier. The tapering roofline flows into an integrated ducktail boot spoiler. Standard AMG Line touches, including the diamond-pattern radiator grille with chrome pins, the air curtains and the wheel arch flares, give it real presence. It rides on 20-inch AMG multi-spoke alloys wrapped in 275/50 tyres. The sidewalls look thick at that size, but the 50-series profile is a deliberate comfort choice, and it shows on the road.

Space and interior practicality

The cabin seats five, though the design shows its age in places. High-set centre-console grab handles and a standard panoramic sunroof enhance the feel, and the plunging roofline reduces rear headroom compared with the boxier GLE wagon. Average-height adults still sit comfortably, with ample knee room.

Luggage capacity is claimed at 655 litres, expanding to 1 790 litres with the split-folding rear bench lowered. That beats the BMW X6 (580 to 1 530 litres) and the Range Rover Sport (647 to 1 491 litres). The loading lip sits high due to the tapered tailgate, but the hands-free power tailgate makes loading easy. Up front, the standard electric sport seats with memory offer excellent lateral and lumbar support. The rear side-window sun blinds are a miss, though, since the BMW X6 includes them.

Drivetrain 

The highlight is Mercedes-Benz’s OM656M 3.0-litre turbocharged inline-six diesel. It produces 270 kW, with a 15 kW EQ Boost mild-hybrid assist for a combined 285 kW, and 750 Nm of torque available from as low as 1 350 r/min. Power delivery on the open road is smooth and relentless, and the diesel’s soundtrack is more pleasing than you might expect. The mild-hybrid starter-generator smooths out any low-down turbo lag, sending the 2 295 kg coupé from 0 to 100 km/h in 5.7 seconds. It won’t pin you into the headrest like the V8 petrol BMW X6 M60i (4.3 seconds) or the Cayenne S (5.0 seconds), but that low-down surge makes mid-range overtaking feel effortless.

Fuel economy & range

This is where the GLE 450d clearly beats its petrol rivals. Mercedes claims a combined consumption of 7.5 L/100 km and CO2 emissions of 194 g/km. With its 80-litre tank, that gives a claimed range of 1 067 km. In my experience, 9.5 L/100 km is realistic, which works out to roughly 840 km on a full tank. That is still a strong figure for a car this size. I measured consumption on a commute to work and was impressed by how much for something this big. On long hauls across the Karoo or between Johannesburg and Durban, you’d stop roughly once every 800 to 850 kilometres, which is a real advantage.

I measured the fuel consumption during one commute to work, and it was impressive for such a big car

Driving impression

In Comfort mode, the 9G-Tronic gearbox shifts almost imperceptibly, selecting high ratios early to ride the diesel’s torque. Sport mode sharpens throttle response and makes the transmission downshift more readily. I used the car for the drive to and from an endurance race over a weekend, and after two gruelling days in the sun, arriving somewhere effortlessly comfortable made a real difference.

The steering is light and tuned for relaxed cruising rather than dynamic driving. At 2 295 kg, the car feels its mass during quick direction changes, but body roll is well controlled for its size. The adaptive air suspension floats over potholed suburban streets and gravel corrugations, and high-speed cruising stays quiet with little wind noise. The standard steel suspension on 20-inch wheels is also surprisingly supple, so this is an excellent open-road cruiser.

Safety

Standard safety kit is top-tier:

• 9 airbags (including driver and passenger knee protection)

• Pre-Safe collision warning with autonomous emergency braking

• Active Lane Keeping Assist and Blind Spot Assist

• Surround-view 360-degree cameras with active park assistance

Towing & utility

The GLE 450d Coupé features a standard tow hitch, with an unbraked towing rating of 750 kg and a braked towing capacity of 2 700 kg. While plenty for double-axle horse boxes or speedboats, heavy-duty haulers should note that rivals like the X6, Cayenne, and Range Rover Sport all boast class-maximum 3 500 kg braked ratings.

Pricing

At R2 395 267 (inclusive of carbon emissions tax), the GLE 450d Coupé provides remarkable peace of mind:

• Warranty: 5-year / 100 000 km

• Maintenance plan: 5-year / 100 000 km

• Service intervals: Condition-based (up to 20 000 km)

BMW and Porsche only offer standard 2-year manufacturer warranties (with unlimited mileage) alongside 5-year maintenance plans, giving Mercedes a meaningful advantage in post-warranty peace of mind.

Verdict

The GLE 450d Coupé was a joy to drive during my weeklong stint; it is a reminder of how capable a big diesel can still be as a long-distance cruiser. At the same time, I couldn't help but feel the current GLE's age after driving the bang-up-to-date CLA recently, all the while knowing that big diesel engines are on their way out. If you're after one of the last truly potent big diesels, this is worth a test drive, but at its current list price, I feel that many will opt for petrol-powered rivals.