A HIGH performance derivative of the rugged Mercedes-Benz G-Class SUV has been announced giving the 2.5-tonne 4x4 supercar-like credentials.

Powered by a 4.0-litre biturbo V8 engine developing 585bhp, the Mercedes-AMG G 63 has a claimed 0 to 60 acceleration time of 4.5 seconds with a top speed restricted to 137mph.

The super G-Class will have its world premiere at the Geneva Motor Show in March and is due to be on the road by August.

Slightly larger than the previous high powered G model, the G 63 has more room inside and comes with what Mercedes calls its optional widescreen cockpit which projects the instruments on to the windscreen as a head up display.

With AMG body styling including large front air vents the G 63 uses aluminium panels for the doors, bonnet and wings and retains full off-road capability.

The G 63 has a nine-speed automatic transmission giving it an official fuel return of 21mpg with emissions of 299g/km.

An optional AMG tweak is available increasing the top speed to 150mph and the G 63 is fitted with a sports exhaust to enhance the note of the V8.

Mercedes-AMG engineers have also reworked the suspension to include coil springs all round and the front axle has an independent, double wishbone suspension while a rigid axle with a five-link suspension is used at the rear.

Adjustable damping is standard equipment as is a variety of drive modes to get the best from the vehicle on and off the road.

Inside, the instrument panel is dominated by two display screens in front of the driver and on the top of the dash while a prominent grab handle is positioned in front of the passenger seat.

Ultra-bright LED lights are also available to improve night vision.

Although prices are still be announced, Mercedes has revealed it will be releasing an Edition 1 version of the G 63 at the start of the sales run which will sit on 22-inch wheels and will come with red trim highlights inside and out.