This week on The Best of Car Talk, Alan thinks his Mercedes was born with a 100,000 mile death gene. Ever since the odometer rolled over, the car's been nothing but trouble and now Alan is ready to dump it. Might he be acting a bit prematurely? Elsewhere, Dave's commute may get more complicated this winter, because his Audi's heater only works on right turns; Keri wants to soup up her scooter after it lost a race to a Vespa; and is Michael going to set off his airbag by drumming along with the Who? Also, two of the best listener car noise renditions we've ever heard. All this and more, this week on The Best of Car Talk.