It’s powered by a 2.0-litre turbocharged petrol engine that develops an incredible 355bhp – the highest horsepower-per-litre figure of any production car..
The A45 AMG also features a new AMG 4Matic four-wheel-drive system and a seven-speed automatic transmission, and rockets from 0-62mph in just 4.6 seconds.
A sports exhaust, new sports suspension and speed-sensitive AMG steering are also included, and the ESP system can be switched between three modes: On, Sport and Off. There’s a Curve Dynamic Assist mode, too, which can brake individual wheels to reduce understeer.
Mercedes claims impressive economy of 40.9mpg and CO2 emissions of 161g/km.
The A45 AMG will be available at the beginning of March, and should cost around £36,000.