I recently bought an A3 1.8T sport (1999). I thought I'd try out the alarm the other day to check it worked (standard a3 alarm). I've set it off however it makes no audible noise, just all the indicators flash- any ideas what I need to check? Does the alarm system have a separate horn for the alarm (instead of using the car horn). The interior car horn only becomes active on ignition- could it be a fuse? My haynes manual does not mention the alarm Any help appreciated! Thanks, Jon.