The Mercedes-AMG A45 gets a drink at the petrol station and then hits the track.

The Mercedes-AMG A45 is on the way with an expected debut at the Frankfurt Motor Show in September. Ahead of the big unveiling, the engineers continue to develop the hot hatch at the Nürburgring, and this video catches it at work. 

Mercedes has already confirmed the major details about the A45's powertrain. It packs a 2.0-litre turbocharged four-cylinder that produces 383 bhp in the base model and 416 bhp from the S trim. Both versions use an eight-speed dual-clutch gearbox. 

Gallery: Mercedes-AMG A45 teaser

The A-Class rides on Mercedes' compact vehicle platform for front- or all-wheel-drive models. The AMG engineers work some magic with this setup by using different AWD tech than other models that allow for a tail-happy Drift mode, which you would generally only see on a rear-drive automobile. Two clutches balance the output between the back wheels can send 100 percent of the torque to a single corner if necessary.

Compared to the already spicy A35, the hotter A45 wears the Panamericana grille with an array of vertical slats. There are also larger side sills. A revised rear bumper makes room for the dual exhausts on each side, rather than the single pipe exiting from each corner of the A35.

We don't yet have an exceptional view inside the A45, but the glimpses from spy shots suggest the cabin is similar to the A35. The differences would include tiny tweaks like different trim and possibly more heavily bolstered seats.

Sales of the A45 in Europe should start before the end of the year.