Mercedes has released the first teaser video of the 2012 A-Class, ahead of its debut at the Geneva Motor Show.

Mercedes has released the first teaser video of the 2012 A-Class, ahead of its debut at the Geneva Motor Show.

Wrapped in QR code camouflage, the prototype will be one of several models running around Germany as part of a contest which will award one lucky contestant with a trip to the car's unveiling in Switzerland. To enter into the contest, people will have to download the "A-Class QR-Trophy" app from the Apple App Store or Android Market. Once installed, users can collect ‘badges' by scanning QR codes from prototypes, Facebook and Twitter. Four different badges will be available and each of them will give you an entry into the contest.

As we have previously reported, the 2012 A-Class will ride on the new MFA platform which also underpins the B-Class. Engine options will likely carryover from its bigger brother, so expect five petrols with outputs ranging from 109 PS (80 kW / 108 hp) to 204 PS (150 kW / 201 hp). There should also be four diesels with 122 PS (90 kW / 120 hp) to 204 PS (150 kW / 201 hp).

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2012 Mercedes A-Class teased - debuts in Geneva [video]