This tiny vehicle, scooped in central Berlin this weekend ahead of its Frankfurt motor show reveal, is apparently an official Audi concept car.
It was being filmed on the busy Potsdamer Platz in full view of the public and despite being covered in elaborate disguise, the Audi badge was visible.
Witnesses say the vehicle was near-silently self-propelling and highly likely to be electrically powered.
The tiny cabin accommodates two passengers in tandem formation. Apart from that, little else is known about the car.
However, the VW Group has long experimented with two-seater vehicles, notably the 2002 1-litre Concept and the 2009 L1 super-efficient concept cars, which used diesel and diesel-hybrid drivetrains.
VW also showed the open-cabin, three-wheeler GX3 concept in 2009, which used motorcycle technology.
German manufacturers - including Messerschmitt and BMW’s Isetta - have an illustrious history of tiny ‘bubble cars’, which used basic motorcycle technology and enclosed cabins to get a war-torn nation back on the road after WW2.