Skip advert
Advertisement

Mercedes GL 450 CDI

Super-sized US-built Merc has an impressive array of technical innovations

Although the GL wears a German badge, it’s built on the other side of the Atlantic in Alabama – and its huge dimensions leave you in no doubt that it is designed with American customers in mind.

Under the skin, the Mercedes uses the same platform as its five-passenger ML stablemate. But with the bodywork stretched to fit in an extra pair of seats, the styling doesn’t work as well.

It appears more slab-sided and lacks the upmarket feel of the Range Rover. In fact, only its huge size helps it stand out from the crowd. Inside, it comes into its own because it is significantly more spacious than its rival.

With all five rear seats folded flat, it boasts a cavernous 2,300-litre load area. And even with the chairs up, there’s still plenty of room for passengers. The middle row offers decent space, and at the touch of a button the third section of seats rises out of the floor.

Impressive

Thanks to wide rear doors, access to this row is impressive, too, although it’s available only from one side. Up front, the cabin layout is similar to a saloon’s. And apart from the fact you sit high above the tarmac, you don’t feel as though you are in an off-roader in the same way as in its rival.

Unfortunately, the COMAND navigation system and switchgear are a generation behind those found in newer Mercedes models. And while the cabin is well built, the materials are not as luxurious as the Range Rover’s.

Advertisement - Article continues below
Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

iX1

2027 BMW

iX1

22,665 milesAutomaticElectric

Cash £24,336
View iX1
EQB

2024 Mercedes

EQB

69,921 milesAutomaticElectric

Cash £19,700
View EQB
M2

2017 BMW

M2

40,000 milesAutomaticPetrol3.0L

Cash £29,995
View M2
1 Series

2019 BMW

1 Series

84,590 milesManualPetrol1.5L

Cash £7,990
View 1 Series

Overall, while the GL’s cabin is practical, it lacks the individuality and sense of occasion you would expect in this price range. Instead, you have to rely on its technical abilities to impress you – and it doesn’t disappoint.

On the road, the GL resists body roll well and can be pushed through corners far faster than the Range Rover. The weightier steering delivers a noticeably more positive response as well. However, the price you pay for this agility is a firmer ride.

Our car was fitted with optional 20-inch wheels and we found that, while the air-suspension coped well with undulations, expansion joints and uneven surfaces sent ripples up into the cabin. With 302bhp and 700Nm of torque, the GL 450’s 4.0-litre CDI engine provides noticeably more punch than its British rival, and the Mercedes feels faster in all circumstances. However, the seven-speed gearbox kicks down far too frequently when it could easily make use of the vast reserves of torque instead. But in manual mode, using the steering wheel-mounted paddles, the GL is surprisingly sporty.

In addition to its on-road prowess, the GL performs superbly off-tarmac. Rotary knobs on the centre console allow you to select low-ratio transmission settings and Hill Descent Control, while the air-suspension can be raised for wading plus improved approach and departure angles.

The GL 450 CDI is practical, robust and dynamically accomplished both on and off- road. But does it have the all- round desirability and upmarket appeal to justify its price tag – and topple the Range Rover?

Details

Chart position: 2
WHY: Thanks to a practical seven-seat cabin, impressive dynamics and more power than the Range Rover, the big Mercedes is a serious contender here.

Skip advert
Advertisement

New & used car deals

Skoda Kodiaq

Skoda Kodiaq

RRP £39,390Avg. savings £9,673 off RRP*Used from £25,250
Vauxhall Corsa

Vauxhall Corsa

RRP £11,564Avg. savings £5,842 off RRP*Used from £9,349
Volkswagen Polo

Volkswagen Polo

RRP £8,495Avg. savings £3,298 off RRP*Used from £6,250
Volkswagen Golf

Volkswagen Golf

RRP £12,795Avg. savings £3,429 off RRP*Used from £10,895
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Used Car of the Year 2026 is the Hyundai Ioniq 5
Used Car of the Year 2026 - Hyundai Ioniq 5

Used Car of the Year 2026 is the Hyundai Ioniq 5

While you can’t go wrong with any of our Used Car Awards winners for 2026, the Hyundai rose above the rest
News
21 Oct 2026
New Chery Tiggo X7 revealed: who knew a Tiggo could get so tough?
Chery Tiggo X7 - front 3/4

New Chery Tiggo X7 revealed: who knew a Tiggo could get so tough?

Chery's new Tiggo X7 SUV promises greater off-road ability than the standard Tiggo 7, but UK launch plans remain unclear
News
21 Oct 2026
Tories spark rumours of 'heavy car tax' in Labour budget - here’s what it could cost
Land Rover Defender V8 - front cornering

Tories spark rumours of 'heavy car tax' in Labour budget - here’s what it could cost

The Conservative Party is claiming that Chancellor John Healey may bring a weight-based car tax supplement in with the next budget
News
23 Oct 2026