From: "Ian Duff" 

    Subject: Central Locking Re-sync and Re-program of remotes FAQ


    By way of introduction, I have just successfully used this 
    to overcome a problem on my wife's 1995.5 S6 Avant that the 
    local dealer was ready to solve by replacing the central 
    locking vacuum pump, to the tune of way more than I was 
    willing to pay. I've seen mention of others pursuing a 
    solution, so I smooged together posts I've collected along 
    with my experience following them. 


    If the locks and alarm are out of sync, try the following 
    (from a post by Fred Munro):
    Make sure you have the code for your radio before you start this.

    1. Remove back seat bottom
    2. Open right rear door
    3. Lock car with key or remote
    4. Disconnect battery
    5. Unlock car with key
    6. Reconnect battery

    This should get the locks and alarm back in sync.
    Note: there are posts that describe removing relays to do this. 
    It didn't work for me. I would hazard a guess that the relay 
    removal method only works for infrared-equipped cars, and not 
    for wireless.


    If your wireless remotes aren't working, this should bring 
    them back to life. This is based on a post by Frank Amoroso 
    paraphrasing a TSB, with a bit of detail added.  

    You'll need two keys and all your wireless remotes.
    1. Replace the battery in each wireless remote with a new 2032 battery.
    2. Turn the ignition to "on" without starting the engine.
    3. Close everything that must be closed for the alarm to activate.
    4. Using the second key, slowly lock the car at the driver's door, 
       taking care not to jerk the key in the tumblers, and release the 
       key (i.e. don't hold it over as you would if you wanted to raise 
       all the windows after locking), leaving the key in the lock.
    5. On the first wireless remote, press both buttons at the same 
       time. Hold them both pressed for 5 or 6 seconds. You've been 
       successful with this wireless remote if the car unlocks itself, 
       while holding both buttons pressed, after 5 or 6 seconds.
    6. I've had to do steps 4 and 5 a couple of times on a reluctant 
       wireless remote to get it to come back to life. If you have to 
       repeat these two steps because the car didn't unlock itself while 
       you were holding the wireless remote, try moving it to a different 
       location for the next attempt. I've had the greatest degree of 
       success holding the wireless remote fairly close (a foot or so) 
       to the driver's door lock.
    7. Repeat steps 4 and 5 for each succeeding wireless remote, 
       up to a maximum of four.
    8. Turn the ignition off.

    You should now have operable wireless remote that lock and unlock 
    the car, as you would expect them to.

    Note: this must be done on all wireless remotes. If you do only one, 
    your others will suddenly no longer work.

    If you have the two wireless remotes that came with the car, one 
    should activate the settings in seat memory position one, and the 
    other should activate the settings in seat memory position two. 
    I've been unable to find a description of how to set this up if 
    this isn't the case (and haven't looked too hard, since mine work 
    as advertised). The owner's manual describes how to make this so 
    specifically for infrared remotes, but does not mention wireless.

    BTW, while dealing with locking and keys, the illuminated key 
    uses a 625 battery. Good luck.

      -Ian Duff.