For The 382bhp 5.5-litre petrol engine will propel you from 0-62mph in 5.8sec – impressive for such a big car. Sport trim kit list adds luxuries such as leather and Alcantara upholstery.
Against As performance rises, so do running costs - alarmingly. Ride struggles to cope with bumpy roads. Interior plastics and details look a little cheap in places. Don't take it off road.
Unless you really want the extra performance from this engine, we'd stick to the two lowest-powered units. The running costs will make all but the seriously wealthy weep.
There is a – perhaps surprisingly – wide range of engines available in the M Class, and none is short of grunt. Even the lowest-powered engine is adequate, and only the power-crazed will stray beyond the 221bhp 3.0-litre diesel, which is our favourite engine.
Also don't forget that, if you're looking for an 4x4 that can do a few MPV tricks, you won't find it here – unlike some of its rivals, the M Class doesn't offer a seven-seat option. It's a strict five-seater. Likewise, don't come to the M Class expecting a full-on mud-plugger: its off-road capabilities are extremely limited.
What's perhaps more of a surprise is that you can get pretty major discounts on this Mercedes, and you can start your shopping by checking out our offers section.
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