Hi.
I have an A8 2008 mod. 3.0 TDI and having some issues regarding the fingerprint system.
The key-less system as such works with both keys and unlocking puts the mirrors, seat, belt and steering wheel acc. to memory.
However there is no light in the keys when approaching the car, only when pressing the unlock/lock button.
But when I`m trying to register a user it doesn`t work quit that good.
 I can`t program the one touch memory via MMI. If I follow the menu in the MMI: "Car - Users - User 1 - Select Finger", the error message "Communication error. Please try again." is displayed immediately on selecting a finger. If I press the start button while selecting a finger, the message "Please release identification sensor." is displayed. On releasing the start button "Communication error. Please try again." is displayed.
Setting Car - Systems - Seats - Drivers Seat - One-touch Memory to 'on' immediately changes back to 'off' no matter if the Remote Key setting is set to "on" or "off"
Every time I start the car I have the picture of a fingerprint in dash saying that the user is not recognized, it stays on for about 5 sec.
Anyone have any ideas?