It was inevitable really: SUVs are fast replacing conventional saloons and estates in all the smaller mainstream classes, so it was only a matter of time before it happened to the largest of them all. This new Mercedes-Benz GLS is larger in every dimension than its predecessor and is so clearly trying to be the S-class of the SUV world that those exact words form the tagline with which it will be marketed.

Unlike a Range Rover, Rolls, Bentley or Lamborghini SUV, there’s not just space for seven in here, but space to spare. Given its aspirations I expected it to be luxurious and comfortable, refined and laden with gadgets. What I absolutely did not expect was for it to be quite so good to drive.

At present only two versions are earmarked for the UK, the as-yet-unseen 600-plus horsepower AMG 63, and this 325bhp 3-litre 400d model. The motor is smooth, punchy and works wonderfully well with its nine-speed gearbox, but it’s the chassis that’s the real surprise. OK, this is no Lotus Elan, but the car is wieldy in a way you’d just not expect of one so high and heavy. It is genuinely pleasurable to drive yet ride quality has not been compromised.

No, it’s not quite an S-class in SUV form, but it gets closer than I had imagined possible. For a big family in need of doing big distances, I can’t think of a car on sale that would do the job better than this.

Andrew Frankel

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Mercedes-Benz GLS 400d

Price £74,075
Engine 3.0 litres, 6 cylinders, turbo
Power 325bhp@3600rpm
Weight 2490kg
Power to weight 131bhp per tonne
Transmission nine-speed double clutch, four-wheel drive
0-60mph 6.3sec
Top speed 148mph
Economy 32.8mpg
CO₂ 227g/km
Verdict Surprisingly excellent

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