Have a 1999.5 A4 and am looking for information on whether or not I can retro the new navigation system into it.

Imagine this: Excursion with Xenons AND a navigation system (or even a car PeeCee), soccer mom driving while on the cell phone, putting on makeup or eating lunch and ten (that's right, ten) screaming kids in the back going to soccer practice. Be afraid, VERY AFRAID!!! What ever happened to just "DRIVING"???