Guys, I bought a s4 from a non audi dealer. Anyway the car didint have sat nav, which was one of the options i wanted. Anyway i phoned audi (Wimbledon) to see if I could get it put in. They said no ???? Apparently they cant put it in once the car has been sold That cant be right can it? If it is how would i go about getting the nav+ system put into my car. I did consider another model of sat nav but i want everything flush in the centre console. Any suggestions and is the nav+ system even any good?