I was getting through this quite nicely until
Spoiler
I got into the apartment. I've escaped the bad guys. I can't leave by the apartment door yet. Looks like I have to do something with the console, but tinkering around with it doesn't seem to help.
So what's the next step? Thanks.
EDIT: OK, I worked it out in the end:
Spoiler
I needed to phone Matthias.