I just tried to activate the theft deterrant system on my 1989 525i, it worked sort of. I did all the code stuff and the code light came on and then I got out of car and locked doors. I then tried to open doors and nothing happened. I got into the car and tried to start car, thats when the alarm sounded. In the manual though, it says the hazards and high beams should be going, and that it should happen even if I only try to open the doors or lids. It does say though, that the system is actibated with the operating of the unlock inhibit system. Does that mean I have to leave the doors unlocked in order for the alarm to sound and lights to flash when I open the door???? Am I doing something wrong here?