Mercedes GLE 400e Review: PHEV SUV Faces Tough Rivals

The Mercedes-Benz GLE 400e AMG Line represents the latest evolution in plug-in hybrid SUVs, combining a potent electric battery with a turbocharged petrol engine to deliver low-emission driving in a luxurious package. Priced from around £82,000, it promises up to 60 miles of electric-only range, making it appealing for company car drivers seeking tax efficiency. However, in a segment dominated by refined six-cylinder hybrids from BMW and Porsche, the GLE’s four-cylinder powertrain and handling quirks prevent it from claiming top honors.

Powertrain and Performance Breakdown

At the heart of the GLE 400e is a 2.0-litre turbocharged four-cylinder petrol engine paired with an electric motor and a substantial 31.2 kWh battery pack. This setup yields a combined output of 375 bhp and 650 Nm of torque, channeled through a smooth nine-speed automatic transmission and Mercedes’ 4MATIC all-wheel-drive system. Acceleration from 0-62 mph takes 6.1 seconds, with a top speed electronically limited to 155 mph—respectable figures, but trailing the BMW X5 xDrive50e’s quicker sprint thanks to the German rival’s more powerful six-cylinder setup.

Mercedes claims an official electric range of around 60 miles, matching the BMW and edging out the Porsche Cayenne E-Hybrid. Real-world tests confirm this is achievable with careful driving, particularly on urban routes where the electric motor handles most duties silently and efficiently. The battery supports rapid DC charging up to 60 kW, allowing a 10-80% top-up in under 20 minutes—a standout feature for those with access to public fast chargers. Yet, efficiency drops markedly once the battery depletes, with combined figures around 282 mpg (WLTP) but real-world returns closer to 40-50 mpg without regular plugging in.

This table highlights how the GLE holds its own in range and pricing but concedes power and acceleration to competitors.

Driving Experience: Comfort Over Agility

On the road, the GLE 400e excels in effortless cruising, with the electric motor providing instant torque for seamless overtakes. The AMG Line suspension, enhanced with adaptive dampers, delivers a composed ride over motorways, filtering out imperfections better than many rivals. However, the four-cylinder engine emits a gruff, unrefined growl under hard acceleration, contrasting sharply with the silkier inline-six units in the BMW X5 and Porsche Cayenne.

Handling reveals further compromises. Despite the AMG Line’s sportier tuning, the GLE feels hefty at over 2.5 tonnes, with noticeable body roll in corners and less precise steering than the Porsche’s athletic poise. It’s no sports car, prioritizing luxury over dynamism—a deliberate choice, but one that leaves it outpaced by rivals in twisty sections. In electric mode, it’s whisper-quiet and responsive around town, ideal for daily commutes.

Interior Luxury and Practicality

Step inside, and the GLE’s cabin justifies its premium badge. The dual 12.3-inch screens running the latest MBUX infotainment system are intuitive, with hyperscreen options available on higher trims. Materials ooze quality: soft leather, wood inlays, and ambient lighting create a first-class ambiance.

Space is generous, with ample legroom and headroom for five adults. The 60-mile electric range doesn’t drastically cut boot space, offering 490 litres—though it’s slightly less than non-hybrid GLE variants. A third row is optional, adding versatility for families. Standard kit on AMG Line includes heated seats, a panoramic roof, and advanced driver aids like adaptive cruise control.

• Pros: Supple ride, spacious cabin, long EV range
• Cons: Noisy engine, weight affects agility, high price

Technology and Safety Features

Mercedes equips the GLE 400e with cutting-edge tech. The MBUX system supports voice commands in multiple languages, augmented reality navigation, and over-the-air updates. Safety is comprehensive: automatic emergency braking, lane-keeping assist, and a 360-degree camera are standard.

The plug-in hybrid system integrates intelligently, with battery preconditioning for optimal charging and driving. One-pedal driving enhances efficiency in urban settings.

Rivals and Market Position

The GLE 400e competes directly with the BMW X5 xDrive50e, Porsche Cayenne E-Hybrid, and Range Rover Sport P460e. The BMW offers superior power and refinement for a slight premium, while Porsche prioritizes driving thrills. Land Rover edges in off-road capability, but all share similar electric ranges.

For buyers prioritizing DC fast-charging and Mercedes’ badge appeal, the GLE shines. Otherwise, rivals provide better balance.

Ownership Costs and Verdict

Running costs favor frequent chargers: BIK tax is low at 5% for 2023/24, with CO2 emissions at 22 g/km. Without plugging in, fuel economy suffers, and servicing remains pricey at Mercedes dealers. A five-year warranty adds peace of mind.

Verdict: The GLE 400e is a capable luxury PHEV with enviable electric range and opulent interiors, but its coarse engine and ponderous dynamics hinder it against polished rivals. Best for those valuing charging speed and brand prestige.

Frequently Asked Questions (FAQs)

How far can the Mercedes GLE 400e drive on electric power?

Up to 60 miles under WLTP testing, with real-world figures around 50-55 miles depending on conditions.

Is the GLE 400e faster than the previous model?

Yes, the updated version shaves time off the 0-62 mph sprint thanks to the larger battery and refined motor.

What’s the boot space like in the GLE 400e?

490 litres with seats up, expanding to 1,800 litres folded—adequate but reduced by the battery.

Does it support fast charging?

Yes, up to 60 kW DC, enabling quick top-ups on the go.

Is the GLE 400e worth it over a diesel?

For short commutes with home charging, yes; for long motorway runs, consider diesel for better economy without plugs.