usually, unless the car has been "plugged in" and potentially "messed with" then SAT NAV DVD is locked in the the drive......thus leaving 99% of the population with the "eject" button in-operative.
"Well Mr Audi 8P Robber, take everything, from mobile phones to child seats but we have made it almost certain to leave the Sat Nav DVD in the required slot, and if you do steal the RNS-E as a whole, we'll be sure to provide you with the original discs as the original, legitimate owner, is unable to remove these ( as any tom, ****. or jerry...."
Audi being safe, and secure... PLONKERS
P.S
I'd actually quite like to play my Tom Jones CD????
Jesus.