Mercedes-Benz is to introduce three further AMG models which will share the underpinnings of the new A45 AMG. The new performance flagships are expected to make their respective debuts at motor shows over the next year. The CLA45 AMG is likely to be shown first, probably at the New York show in March. Following it at September's Frankfurt show will be the GLA45 AMG SUV. The final member of the triumvirate is set to be the CLA45 AMG Shooting Brake; it has been rumoured that it will arrive at next year's Geneva motor show. All three cars will share the A45 AMG's 2.0-litre four-cylinder turbo. By producing 355bhp from 1991cc, the engine has the highest specific output of any 2.0-litre production engine. Expect similar figures for the AMG CLA models, but blunted acceleration in the heavier, less aerodynamic GLA.