Has anyone noticed that some cars in gt3, such as the Audi s4 and Mercedes Cl600, appear while racing in concept, but you cannot drive them? How strange!
If you want to see for yourself race in professional mode with a mercedes sl500!
All of the GT3 cars exist on the GT: Concept 2002 disk. By way of the Xport and a PC garage editing programme, or just by ramming codes into a cheat device, you can get access to drive them.