http://www.audiforums.com/m_44208/mpage_1/key_key%252Cprogram/tm.htm#44208 You may have to clear the memory first.
Remote transmitter coding procedure
- Switch ignition on (using separate key).
- Lock vehicle from outside using key to be coded via driver-side door lock.
- Press "unlock" button within 5 seconds often enough to reach next
memory position (in example given, twice). Every time you hit the button
it goes to a different memory position. So if you hit it twice for the first key
and the second key, the first key will no longer work.
- Every press of the button is confirmed by the emergency flashers and
the anti-theft system horn.
- Wait 5 seconds.
- Now press "unlock" button one more time (vehicle unlocks).
- Switch ignition off and remove ignition key.
- Check function of new transmitter.
Notes:
Be sure that new transmitters are always coded into free memory
positions. If occupied positions (distinguishable by a "1") are used,
the transmitter previously coded to this position will no longer work.
Existing remote transmitter recoding procedure
- Press any button on transmitter.
If vehicle does not respond by locking or unlocking:
- Lock and unlock vehicle within 30 seconds using driver-side lock.
- Now check function of recoded remote transmitter.
Clearing memory positions
Notes:
It is possible to clear all memory positions, e.g. if a customer loses
a remote transmitter. Proceed as follows:
- Switch ignition on using key.
- Then mechanically lock central locking from outside vehicle using key.
- Activate remote transmitter "unlock" button on key five times at one
second intervals. A short horn signal will sound each time.
- Then, after 6 seconds, press remote transmitter "unlock" button to
confirm this clearing procedure one more time.
- Central locking should no longer unlock itself via remote transmitter.
- Switch ignition off.
Up to four transmitters can now be coded again.
