Recently on the CBC Network (Canadian Broadcasting Corporation, similar to BBC) their was an one hour documentary on car thefts. They spent a few days with a professional car thief who shared his knowledge and showed them how easy it is to steal cars. They also parked "bait cars" in parking lots, wired them with cameras and were monitored by surveilance. Anyway, the good news is, Volvos are not on anyones "hot" list. Secondly, the pro said he just walks past a car if it has "the club" installed on the steering wheel. It just isn't worth the trouble. The bottom line is, the pros want to take a car under three minutes. So anything that can slow them down will usually have them move on. For example, you could remove one wheel, and store it in the trunk. Of course you would remove the jack/wrench and store them elsewhere. Just a suggestion.