The car rides on large alloy wheels wrapped in rubber-band tyres. Up front, stopping power comes courtesy of large drilled brakes with similarly massive callipers. The units at the rear seem almost puny in comparison, although these could swapped for something more impressive later into the development cycle.
Cabling running from under the bonnet to inside the vehicle suggests that the engineers inside the car could be monitoring the status of an uprated engine.
In those cars, that fury is sent to all four corners via a seven-speed dual-clutch transmission. While the power and torque outputs will almost certainly increase if this hotter version goes into production, expect the fundamentals of the drivetrain to remain the same.
It’s unlikely that this vehicle is a mule for the next-generation A-Class as we’ve already seen spy photos of the new hatch with a heavily disguised version of the production body.
With the current A-Class due for replacement by 2018, this hotter AMG A45 could the company’s tyre-frying sendoff for the third-generation hatch.
Should this amped up A45 go into production, it's unknown what its name will be. It might be branded as the AMG 45 S, while some have suggested that it could be known as the A45 Black Series, but so far that name has been reserved for two-door models.
We'll just have to wait and see.