Originally Posted by longbow42
Thanks. What does MVB at channel 5 mean?
It is a function of VCDS which is an excellent tool that practically pays for itself in dealer diagnostics fees alone: http://store.ross-tech.com/shop/VCHUC.html
Here is an idea of what it can do: http://wiki.ross-tech.com/wiki/index.php/Audi_A8/S8_(4E
And a "tour" of how it works: http://www.ross-tech.com/vcds/tour/main_screen.html
Note the D4 is not documented on the wiki, I suspect to keep people from stealing Ross-Tech intellectual capital.
I'm thinking I'd like the B&O on my next A8.
Don't think there are any APR tunes for the 4.2, but there is a recent thread on the 4.0
Not sure which year / engine combo you have.