The speedy little estate goes from the petrol station to the track.

If the new Mercedes-Benz CLA-Class Shooting Brake doesn't have enough performance for you, then check out this spy video of the upcoming AMG variant. The speedy variant takes all of the estate's extra utility over the saloon and adds more excitement by boosting the engine output.

Gallery: Mercedes-AMG CLA 35 Shooting Brake spy photos

The recipe for the CLA 35 Shooting Brake is obvious. Take the standard version of the estate, ditch the powertrain, and install the high-output 2.0-litre four-cylinder from the recently unveiled Mercedes-AMG CLA 35 saloon. The long-roof model will offer 302 bhp and 295 pound-feet as an upgrade over the CLA 250 with 221 bhp and 258 lb-ft. A seven-speed dual-clutch transmission will send this power to an all-wheel-drive system with torque vectoring at the rear end. In the four-door, the setup accelerates the model to 60 miles per hour in an estimated 4.6 seconds, and the estate should match this figure – if not equal it.

This spy video indicates that the estate has similar styling tweaks as the saloon. The model would come standard with 18-inch wheels but with an optional 19-inch upgrade. The rear end wears a diffuser with exhausts that integrate into the corners.

The CLA 35 saloon has greater rigidity due to an aluminium shear panel underneath the engine and a pair of diagonal braces. These pieces likely carry over to the estate, too.

The interior largely carries over from other CLA variants. The biggest tweak is the AMG-specific display modes for the MBUX infotainment system, including Classic, Sport and Supersport settings.

A debut date with the CLA 35 Shooting Brake isn't yet certain. With the CLA 35 saloon debuting at the New York Auto Show, expect the estate's unveiling to be before the end of the year.