The E 45 made its official debut at the New York motor show before a scheduled UK sales launch in September, the 395bhp four-door is the fourth in what Mercedes-Benz says will be an extended range of second tier AMG models to rival similarly conceived offerings from Audi’s S and BMW’s M Performance line-ups.
Like the recently revealed SLC 43, C43 Coupe 4Matic and C43 Convertible 4Matic, the new E43 4Matic saloon is powered by a reworked version of Mercedes-Benz’s twin-turbocharged 3.0-litre V6 petrol engine with added turbocharger boost pressure, revised software mapping and a two-stage exhaust.
Yet, while the AMG-fettled engine delivers 362bhp at 5500rpm in the SLC 43, C43 Coupe 4Matic and C43 Convertible 4Matic, the 2996cc unit receives a further series of power enhancing changes, including larger turbochargers running 1.1bar of boost pressure, for use in the E43 4Matic.
As a result, power has increased a further 33bhp beyond the base unit, providing the E43 4Matic with a sturdy 395bhp at a higher 6100rpm. Significantly, the revised engine delivers a higher specific output than the 502bhp version of AMG’s dedicated twin-turbocharged 4.0-litre V8 at 132bhp/litre versus 126bhp/litre.
With an official 1765kg kerb weight, this endows AMG's latest model with a power-to-weight ratio of 224bhp/tonne. Torque, meanwhile, remains the same as other new AMG models fitted with the V6 engine, peaking at 383lb ft between 2500rpm and 5000rpm.
In comparison, the Audi S6 saloon’s twin-turbocharged 4.0-litre V8 delivers 444bhp and 406lb ft of torque.