Need some help
 

Hey guys,

I own a 1998 audi a4 s line, it has the audi symphony deck and i want to upgrade to a navigation unit. Perferebly i would like to get a factory audi unit. Is there any units the are compatble with my car? I found these 2 decks on ebay one is from a 2001-2003 a8 and the other is from a 2002 a4, will any of these work?

any help is appreciated