Originally Posted by zipfer

Yes you can do it by your self.
one thing first, do not use the new key under any circumstances before this procedure, because the immobilizer will show fault code 52 and wont start.

1. Check the immobilizer light is flashing in standby mode.
2. Put in the red key and turn on and then off within 5 sec.
3. Insert the first black key asap (5 sec) and turn ignition on. then the immobilizer light should start flashing and the key is registered when it stops flashing.

For multiple keys registration just put in the second key directly after the first key meanwhile immobilizer light still flashes.
All other (now non registered) keys will be lost from memory.
Only 2 keys can be stored excluding the red one.