The Mercedes E63 AMG has been revealed on Facebook, days before its official unveil at the Detroit motor show next week. The latest incarnation of the supersaloon will receive a series of mid-life revisions as part of the standard E-class’s facelift.

It is understood that the supersaloon is in line for a power hike, bringing the 5.5-litre twin turbo V8 to around 540bhp and taking torque to 531lb ft. UK models will retain the rear-wheel drive setup, but other markets will have the option of Mercedes' 4MATIC all-wheel drive configuration. It will have a rear-biased 67/33 power split rather than the 55/45 split of standard E-class models.

The 4MATIC system is tipped to add around 60kg to the standard car. Performance is rumoured to be improved, with the car's 0-60mph time dropping to around 3.5sec, although it is not known if this is in rear- or four-wheel drive spec, or if a Performance Pack is necessary to achieve that time. Insiders claim 4MATIC models will be slightly quicker. The Performance Pack will add around 25bhp and 26lb ft and raise the top speed from 155mph to 186mph.

Other changes to the E63 AMG  focus on the exterior styling, interior trim and the infotainment system. The quad headlights have been ditched in favour of two single-element lights with integrated LEDs. The grille has been brought in-line with the recently-announced E-class facelift, while the front bumper features large vents in the bumper with black mesh. The rear lights will also be revised, and the car will carry a 'V8 Biturbo' badge on the front wings.

Inside, there will be new instruments, higher-quality trims and the latest version of Mercedes’ Comand infotainment system.