Yes , another question in the category “nuts� – I was told by Audi UK that all A3 2005 should have built-in Category 1 Alarm and Immobilizer. How can I check if mine has Alarm ? The car-key only has buttons for lock/unlock the car but none for activating/deactivating an alarm !?!?

if indicators flash once on lock and twice for off yhes yes, easy way sit in car lock it and pull bonnet release, that will set it off,