I have the same problem (tried with 2 different (E.....zer, D....ell) CR2032 batteries).
Anyway, to answer the question:
The re-coding procedure:
Open the centralized command with the remote control. Do not turn on the ignition.
Set DIP SWITCH N° 2 to the > ON < position on the part N° 000 054 640 (the little black box).
Press the two buttons on one of the transmitters (either can be used) until its LED goes out. Release the keys. The LED will remain on. Now briefly press the bigger key. The LED will come on for about 1 sec.
The problem is that with the new battery, the LED won't go out, no matter how long i press the two button...
Anybody?
iscsu
October 2007