Mercedes ML320 CDI Sport

Before you climb in, it's hard not to be impressed by the design. Only from the rear three-quarter view does the big Merc look awkward; elsewhere it's muscular and stylish.

Inside, many parts and dials will be familiar to drivers of Mercedes' other models, but crucially everything feels well built and of a high quality. There's lots of space, too.

Unlike its predecessor, the new M-Class does without traditional 4x4 gizmos such as a locking centre differential and low-range gearbox in standard form. Instead, it relies on hi-tech systems linked to the brakes and stability control to get you through sticky situations.

Our test drive proved this technology still makes the M-Class a capable off-roader. But for those who want to go one step further, a mud-plugging 'pro' pack including low ratios is a ΂£1,320 option.

However, few models will face anything more slippery than a gravel driveway. Where the M really proves its worth is on the tarmac; it rides smoothly, with taut handling that's infinitely better than previously.

Our test model featured Mercedes' refined and punchy new V6 diesel. A lower-output oil-burner will follow, along with a mighty AMG version, but for now the only alternatives are V6 and V8 petrols.

The price of progress is ΂£2,500 - that's how much the M-Class's cost has risen, with the entry-level car ΂£36,710. It's a lot of money, but buyers get a capable, versatile 4x4.