How to Unlock the Audi R8 in quot;Midnight Club LAquot;

1. Visit the 'Midnight Club: Los Angeles' official website and click on the top link for 'Social Club.' This will redirect you to the Rockstar Games Social Club website, where you can register and sign up for an account.
2. Click 'Sign Up' and fill out your personal information to join the Rockstar Games Social Club. Verify the account using your PlayStation ID number or Xbox Live account name depending on the console you have.
3. Obtain the Class A, B and C licenses by completing challenges. This is done through achievements, which are listed on the Rockstar Games Social Club website. Click on 'Midnight Club: LA' > 'Los Angeles Driving Test' to bring up the list of in-game challenges and your progress toward achieving them. When you have completed all of the challenges, you will have obtained your Class A, B and C licenses. The Audi R8 will then appear in your in-game garage within 24 hours of completing the achievements.