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Mercedes have revealed details of its fastest SLK Roadster yet - the 400bhp SLK 55 AMG Roadster Black Series.

Using a 5.5-litre engine, the SLK’s power has been boosted from 360bhp to 400bhp and weight has been reduced by 45kg.

Power has been boosted by fitting a sports air filter and a newly developed exhaust system, with power fed through a seven-speed semi-automatic gearbox.

This means the German sports car rockets from 0-62mph (100kph) in 4.5 seconds and – with the electronic limiter removed – runs on to a top speed of 173mph.

Rolling on 19-inch AMG alloys, the Merc’s handling has been improved with racetrack-optimised suspension, while stopping power is boosted with larger brakes.

And the AMG is made more exclusive with its restyled front and large air intakes.

Mercedes is also offering the SLK with a skid-reducing limited slip differential for an additional £2,400. Various carbon fibre options can also be added to the package for between £1,800 and £4,300.

The Mercedes SLK 55 AMG Roadster is available by special order for around £63,000.

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