The 'entry-level' 383bhp CL500 is incredibly quick, although acceleration isn't on a par with other super-coupes like the Bentley Continental GT. The smooth 510bhp V12 CL600 can outdo the Bentley with ridiculous amounts of pulling power, however, while the CL63 AMG is quick enough to give you an impromptu face-lift.

The CL has a superbly comfortable ride and, considering its size, also handles exceptionally well. It's still a big car, however, and the steering is a little light on feedback for really chucking the CL about. We doubt this will worry many buyers - overall the CL has great ability.

Wind- and road noise are almost entirely banished from the cabin. The automatic transmissions are also very slick. Change down a few gears as you're cruising along the motorway, and your passengers are unlikely to notice.

There's no getting around the fact that joining the CL club is expensive. If the extraordinary list prices don't put you off, the large fuel bills certainly won't. Residual values are strong, but even a few per cent off these kind of sticker prices is an awful lot of cash.

The CL is extremely well-made from the choicest materials. Every switch, button, handle, lever and knob operates smoothly and suggests the CL will still be going long after you've gone. Mercedes has vowed to return its more reliable ways, so should have invested heavily in this flagship car to make good on its promises.

All you would expect in a car of this class is included, from all-round airbags and clever adaptive headlights to stability control and powerful, electronically-controlled brakes. Options include a new system which automatically applies up to 40% of maximum braking pressure to minimise impact speeds if you're not watching what you're doing.

A wide range of seat and steering wheel adjustments means you'd have to have the top half of Geoff Capes and the bottom half of Bonnie Langford not to get comfortable. Controls are easy-to-use and centre on a 'Command' rotary knob which combines many functions in one. It's not hard to get your head around.

It's a big car, so there's lots of space in the cabin, particularly up front. There's enough room in the back to keep adults happy, although a trans-continental slug might be a bit much to ask. Enormous boot has plenty of space for a few sets of golf clubs.

Leather upholstery, climate control, electric seats and wood trim are all standard across the range. The CL600 also comes with voice control, hard-disk satellite navigation and seats that can massage your back and fan your bottom with chilled air.