The third-generation Mercedes-AMG E 63, the most powerful series-production four-door model from AMG to date, is on sale now, priced from £78,935.
That gets you the 4Matic+ model - making it more expensive than the current BMW M5, which is priced from £73,985 - while the S 4Matic+ is priced from £88,295 and the range-topping 4Matic+ Edition 1 costs £106,585.
First customer deliveries are expected in June.
The standard E 63 comes with AMG Ride Control sports suspension, 19in alloys, a Nappa leather interior and split folding rear seats, as well as two 12.3in screens for infotainment and driver display.
The E 63 S adds 20in alloys, active dynamic engine mounts, AMG performance seats and a leather steering wheel to that. Edition 1 variants get different black 20in alloys, a new paint finish, some Titanium Grey detailing above the side skirts, and carbonfibre trim inside.
A number of different options packs are available. The E 63 S and Edition 1 are avaialable with AMG ceramic brakes for £6996, while an AMG performance exhaust can be added on all models for an extra £1000.
The car was revealed at the LA motor show, with Mercedes claiming it offers the biggest step forward in performance for its new models.
Speaking at the brand's LA press show, Mercedes president and US CEO Dietmar Exler said: "The E 63 is the most powerful car we have produced but it comes with intelligent AMG cylinder management, making it the most efficient AMG. You will pushed to find a car with better power to consumption ratio.
"It is the biggest step forward from one generation into the next."
Indeed, the new E 63 is the fastest-accelerating model ever produced by Mercedes’s burgeoning performance car division with an official 0-62mph time of 3.4sec in range-topping S 4Matic+ guise.
The new E 63 also holds the distinction of being the most powerful series production four-door model from AMG to date.
Fitted with AMG’s twin-turbocharged 4.0-litre V8 engine, the new E 63 will continue to be sold in two distinct versions. In standard E 63 4Matic+, it has 563bhp and 552lb ft of torque. The most popular model, however, is expected to be the range- topping E 63 S 4Matic+, which has added turbocharger boost pressure and other power enhancing tweaks, allowing it to produce a stout 603bhp and 626lb ft.
The recently unveiled BMW M5 Competition Edition’s twin-turbocharged 4.4-litre V8 engine serves up 592bhp and 516lb ft, while the Audi RS6 Plus’s twin-turbocharged 4.0-litre V8 gets 597bhp and 553lb ft.
The E 63's new engine, which is mounted on dynamic mounts in the E63 S 4Matic+, replaces the older twin-turbocharged 5.5-litre V8 used in the outgoing second-generation car, providing the standard model with an added 14bhp and 29lb and the S with an extra 26bhp and 37lb ft over its predecessor.