This week on The Best of Car Talk, why did Bob’s mild-mannered dog go wacko when Bob dumped his Mercedes and bought an Audi? Is the pooch status-obsessed, or is there an olfactory explanation? Elsewhere, Ellen’s Camry smells like rotten eggs, and she thinks her dealer is blowing sulphur up her skirt, rather than fixing it. Also, Glen’s vacation got a little more exciting when his rental car caught on fire. Was it Glen’s fault, and, more important, did he tell the rental company? And on Stump the Chumps, we find out if Bill learned to drive a stick shift in time for the high school dance, and if his date is still speaking to him. All this and more, this week on The Best of Car Talk.