TT [MK1 8N] (1998–2006)
The production model (internal designation Type 8N) was launched as a coupé in September 1998, followed by a roadster in August 1999. It is based on the Volkswagen Group A4 (PQ34) platform as used for the Volkswagen Golf Mk4, the original Audi A3, the Škoda Octavia, and others.
The MK1 will only fit a single DIN radio. The radio systems had a change in 2001 although looking cosmetically the same.