Mercedes-Benz has started early testing on a new C63 AMG coupé. The model, which is expected to join the C-class line-up at the end of next year, has been spotted carrying out performance tests at the Nürburgring.
With the current C63 AMG coupé is due to continue production until May next year, this early development mule wears bodywork from the upcoming C63 AMG saloon, with only its modified track giving away its true identity.
The C63 AMG saloon is due to go on sale following a public debut at the LA motor show in November, with estate, coupe and cabriolet versions set to join it before the end of 2016.
As with the other planned C63 AMG variants, the C63 AMG coupé is likely to use a new twin-turbocharged 4.0-litre V8 engine with close to 500bhp.
That engine will replace the current C63 AMG's 6.2-litre V8 engine, which comes with 451bhp in standard form. The use of forced induction on the new model is likely to push its available torque beyond the 443lb ft of today's car.