This week on Car Talk, the untended 3:00 AM car alarm is one of the great nuisances of urban life. But, for Mike in DC, the problem is especially annoying. The offending car is parked at a nearby embassy, and the Police won't go near it. Does Mike need to get a vote from the UN Security Council to finally get a good night's sleep? Meanwhile, Twila in Missouri is hoping Tom and Ray can intervene, and break the news to her brother that his truck got smashed while under her watch--even though it wasn't her fault. Also, a fiery trip down a mountain teaches Jerry the importance of downshifting; a 15-year-old asks whether eccentricity is a matter of Nature or Nurture; and on Stump the Chumps we find out why Carla in Alaska's truck could only climb hills backwards.  All this, and lots more, this week on Car Talk.