Just a quickie....
I was just on the post about replacing the batteries in the alarm unit ( Audi A4/B6 Alarm Siren - Replace NiMH Batteries )
and my virus scanner popped open warning that there is a virus on the page. I think it was to do with one of the advert banners, not sure which one sorry. I had been on the page for a little while before it popped up.
Anyway, just letting you know to be careful