I just bought a used 2000 A6 Avant and the Nav system does not work. The dealer said it needs a new Nav-ECU. The model number is 4B0919887A.

Can I get an online manual for this Nav System?

Where I can get a reconditioned nav unit?

Is it worth replacing?

Thanks.

I would recommend a NAV+ upgrade for the same money... DVD based with 7" screen for mapping and a whole lot more.<ul><li><a href="http://www.navplus.us/forum/viewtopic.php?t=1003">Start with this this thread at Navplus.us</a></li></ul>