What makes the whole thing even more interesting, is that the current government of the state of Berlin is a coalition between the SPD (left-wing) and the Linkspartei (former communist parties joined together) and many people believe that they're not doing enough to stop those acts of violence, which so far are mainly targeted at luxury cars.
...while the conservatives call for "helicopter patrols". Yes, of couse, because ghetto birds with searchlights patroling upper-middle-class neighborhoods is a great idea and will go down with the residents even better than the odd burning Cayenne.
But seriously, what do you want to do to stop this attacks? In the two cases they actually caught the attackers, it were non-political drunken teenagers who thought they could wreak some havoc with the police (and conservatives) blaming the leftists by default.
What the leftists do is leaving bbq lighter tabs next to the tires. These will set fire to the tires, which in turn ignite the car. Once this has happened, the firebug is long gone. As the neighbourhoods they try to "liberate" from "yuppies" are, conincidentally, the "in" quarters of town, with bars on every corner, no curfew and drunken students and tourists around 24/7, you can't just police search everyone behaving suspiciously. Even if police had the manpower, searching every slightly-leftist looking guy who stands or knees close to a luxuary vehicle will have devastating effects on tourism. AND will not go down well with the resident "yuppies", who are mostly young advertising/media/artsy types who, in the eyes of the average police officer, will look like leftists and thus would suffer from this policy, too.
I am not defending the leftists in any way here. I just can't see how anything can be done against them right now.
The only people in Berlin even more useless than the leftists are the Conservatives, on top of it.
EDIT: I just looked up some numbers. While 230 torched cars in a year sound like quite a lot, almost a thrid of them were caused by torchings of corporate fleets, and on top of that, 230 out of approx. 1.2 million cars registered in Berlin (plus fleet vehicles and these operated here, but registered elsewhere for insurance reasons, like mine) are hardly enough to justify bringing out the ghetto birds.