something ? with lock

[Konstantin Bogach]

Hi all.

I did not learn yet lock system in my Audi200tq 89 but it could  not
wait:
when I lock the door something  make a buzz  under rear seat for 20 sec
then stop. During this time I can not unlock the car. Is something going
to die?

First time I heard that buzz was when I connected - terminla to the
battery last time. Before I did not hear it, even when
connected/disconnected the battery.

What is wrong?

Thanks.

Konstantin Bogach.