I wanted to get built in sat nav in my mk4 astra. Ive seen the centre dash for sale in the classifieds and there a 'how to' explaining what screen to get and how to fit it. Very useful . But not sure on how it works, prob a bit of a silly questions but how do you get sat nav onto the screen. Do i need to buy a gps reciever, or what?
Would appreciate any useful info from anyones thats knows or has done this b4.
Thanks in advanced