Navigation system: dealer installable?

[Ti Kan]

Hi all,

I have the Audi navigation system on my new S4 and have been playing
with it and it's pretty cool.  A fellow S4 owner who doesn't have this
option was wondering whether it can be added (by the dealer or otherwise)?
I know that the center console is a bit different between the Nav-equipped
cars (there are additional switches and a rotary knob, and the cig lighter
receptable is farther back), but is it possible the wiring is already
in place?  If so at least the Nav unit itself (with the CD-ROM drive)
should be the easy part...

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
96 A4 2.8 quattro (sold but not forgotten)
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.ibiblio.org/tkan/
///