I'm trying to think of a way to block off the bars that unlock the car...I'm not having much luck.

Fuel pump kill switch is going to save your car from getting stolen in most cases. I'm going to wire one up in the near future.

Broken glass is an easy fix in a 240, but I know from past experiences, it just sucks to have it happen.

Also it is going to suck for those, like me, who have the interior painted. I would be pissed off if I broke into my car and nothing was in there except for a couple nice seats and a dash....

Another thing that could prohibit them from breaking in if you DO have an alarm. Do NOT have window tint. Sometimes alarms don't even go off becuase the window will not make a loud noise do to the tint holding the glass together and causing it to not break fully....