I wanted to have all four doors open at once, but now I can only open the trunk with either the remote or the key itself.

Kind of a pain since I leave the key in the ignition when she is parked indoors.

I tried another code than enabled the ugly alarm horn, and it made no difference.

This is on a 99 A8q.

15176 4 doors, no trunk horn

16200 4 doors, with trunk horn

then next up I will try 5mph autolock
16232

Anyone know if autolock will disengage in the event of a major/airbag accident?

The Auto-Lock will (of course) disengage when the airbag system sends a crash-signal.<ul><li><a href="http://en.openobd.org/audi/a8_4d.htm#46">http://en.openobd.org/audi/a8_4d.htm#46</a</li></ul>