Our spy photographers have snapped up images of Audi’s next generation A3 undergoing testing. Though camouflaged, the new model sports a new front design with changes to the headlights, grille and bonnet.The new A3 shows design elements borrowed from the facelifted A5 and all-new A6. The production version of the A3 will be the first vehicle to ride on the VW Group's MQB platform. Significant use of aluminium and lightweight steel means the new model will weigh up to 80kg less than the outgoing version.Although our spies only managed to capture the two-door model, Audi has confirmed that Sportback, sedan, cabriolet and Avant versions will also join the line-up.NEW INTERIORThe German automaker revealed that the interior of the new A3 will see a step up in quality over the outgoing model. Inspiration for the new interior will be derived from the A1 and A6. We can expect eyeball-style air-vents and oversized switches, with high-quality materials used throughout the interior. The new A3 will also sport a new multimedia interface that incorporates a touchpad in the top of the rotary selector. Powering the range will be a selection of turbocharged petrol engines from a 1.2-litre (78kW) to a 2.0-litre unit capable of producing with 150kW. A 1.6 and 2.0-litre diesel engine will also feature along with an eco model with a CO2 emissions figure of 89g/km.