Built from `2008` to `2010`, the `RS6 C6` saloon takes Audi logic to the extreme: a biturbo `V10`, `quattro`, huge size and supercar pace. Against a BMW 5 Series or a heavily powered Mercedes E-Class, it lives in a category of its own through sheer excess. On the used market it is a spectacular thing, but probably one of the most expensive cars here to return to proper condition.
Its `5.0 TFSI V10 BUH` works with the `tiptronic`, `quattro` and a chassis that has to cope with more than `580 hp`, sometimes with ceramic brakes. The whole question is whether the car received maintenance to match its complexity: cooling, boost hardware, gearbox, `DRC`, brakes, suspension, leaks and fluid history. On this generation almost every intervention is heavy, and every neglected item becomes painfully expensive.