Last week, you may remember we featured BMW specialist Manhart and its awesome upgraded X6 M (MHX6 700). This week the German tuner has turned into attentions to the C63 S Coupé — and it’s a job well done.

In stock form the Mercedes makes 503 horsepower from its 4.0-litre twin-turbo V8; however, with a new set of turbochargers, remapped ECU, an upgraded fuel system, and new exhaust system, it belts out a whopping 690 horses. Top speed climbs from 290 to 310kph and it’ll likely hit 0-100kph in under the stock car’s time of below four seconds. It packs KW coilover springs in all four corners and rides on a set of 21in wheels wrapped in 255/30 front and 295/25 rear rubber. Manhart should tune Mercs more often…