Audi A6 Help Manual page 16

KEY ADAPTION
In PICTURE 28, if press "OK", you will come to the KEY
ADAPTION menu. In this step , the tool will show you the current amount of keys, and you
should input the new amount of keys to be adapted
PICTURE 31
Press "OK", then insert the first key to be adapted into the ignition, turn the ignition to "on" and
hold more than 1 second, then turn off and take out the key, then repeat the same procedure with
the second key and so on until the last key is adapted to the car, the tool will show "finished".
PICTURE 32