The Audi TT

The Audi TT is a two-door sports car marketed by Volkswagen Group subsidiary Audi since 1998. Audi revealed the second-generation TT, internal designation Typ 8J, on 6 April 2006. It is constructed on the Volkswagen Group A5 (PQ35) platform, and uses aluminium in the front bodypanels, and steel in the rear, to enhance its near-neutral front-to-rear weight distribution. It is available in front-wheel drive or 'quattro' four-wheel drive layout, and is again offered as a 2+2 Coupé, and as a two-seater Roadster. Compared to the previous generation, this new variant is five inches longer and three inches wider than its predecessor.

Information provided by: http://en.wikipedia.org/wiki/Audi_TT#TT_Mk2_.28Typ_8J.2C_2006.E2.80.93.29

Wiring Information: On some digitally amplified models the factory amplifier can be turned on by either 12v as per normal or Canbus data, the amplifier accepts BOTH but you need to program the vehicle via the appropriate "VAG programming" software to tell the car the switch from Canbus to 12v. This will allow the CHAD3C to switch the amp on.