I have a 00 S6 with Sat Nav TV, DVD stock system. While playing a DVD the picture
will automatically turn off while I'm driving. Not much fun for my passengers.

Is there an override for this? It doesn't seem to be in the manual.

 

There is a VAG-Com code to make it work up to 10kph.
Other then that, you need to get the unit recoaded, to do "Video in motion" The dealer can't help. There is a guy one Navplus.com that can recode it for you, but you have to send him your Nav.