The Mercedes CLK63 AMG Black series is based on the official F1 safety car and incorporates the pinnacle of Mercedes’ performance technology therefore any tuner wishing to enhance this package has a challenge on their hands, a challenge Renntech was more than willing to take with the release of their latest tuning program.

The monstrous 6.2-liter AMG engine already pumped out 507hp and 630Nm of torque but the Mercedes tuner has managed to pump this up up to 550hp with an additional 60-80Nm of torque. Achieved with a bit of ECU tuning and the addition of long-tube headers and a motorsports style exhaust sharpening throttle response.

“Real-world performance is all about torque, not so much about a peak horsepower number at very high rpm,” explains Hartmut Feyhl, company founder. “It can be very easy to build high rpm horsepower, but to get instant throttle response and mid-range acceleration it is more difficult, and this is where customers really want to feel that improvement.”

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AMG’s 6.3-liter V8 engine has been tuned to output an extra 33hp and 20Nm of torque bringing total ponies to 540hp. Looking at the performance figures we see Kicherer has managed to drop the 0-100km/h to just 4.1 seconds and top speed can now exceed 300km/h.

Subtle modifications to the exterior design retain the Black Edition’s aggressive stance with the addition of a sportier radiator grille made of carbon featuring carbon fibre struts. Other features in the model include lighter three-part wheels and ultra-light front seat buckets made of genuine carbon.

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