The Signature Edition Challenge to win a real-life Mercedes-Benz SLS AMG kicks off today! As previously mentioned, the challenge will be run entirely within GT5’s B-Spec mode and is, of course, open only to Signature Edition owners.

To enter, redeem the voucher code included on the card in the SE’s branded leather wallet in the PlayStation Store. Afterwards, you’ll be able to access the challenge presumably in the game’s “Seasonal Events” (introduced in v1.05). According to the official announcement, here’s how it works from there:

Once they have completed these steps they will be able to access the Signature Edition Challenge from within GT5. The Challenge takes place in Gran Turismo 5’s innovative B-spec mode – where players take the role of team director with their own AI drivers doing the racing. The Challenge is being held over a series of five, five-lap races on different circuits. The choice of B-spec mode opens the competition to more than purely the fastest GT5 racers as players, and there will be no limit on the number of times entrants can complete the races. In-game leaderboards for each region will display the top 50 race times for each circuit, as well as the top 250 combined times across the five races.

Entrants with the fastest total time from each region [2] at the closing time (23:59 (GMT) on 31 January 2011) will be invited to take part in the second phase of the competition – the Mercedes-Benz Driving Event. Winners from each international region will compete against each other in a series of real driving challenges under the scrutiny of judges. Points will be awarded for each challenge with the winner taking home the stunning SLS AMG.