I live in SW London and for the 2nd time in 18 months I have suffered an overnight theft (small, loose items only - sunglasses, parking change etc) from my 2003 BMW 320d saloon (parked on the street). On both occasions my wife and I are virtually 100% certain the car was locked/alarmed, and yet both times there was no sign of forced entry, and the doors have been found unlocked the following morning with the glove box open/items missing. On neither occasion did they gain access to the boot. We reported the matter to Wandsworth police, who told us that it's a common problem with Mercedes, BMW and Audis - somehow thieves have found a way of disabling the alarm/central locking mechanisms to gain entry. Is this something you have heard of before? Are the manufacturers aware of it and, more importantly, doing anything about it? I was under the impression that Audi and BMW were rated very highly in terms of security.