Whats that foul, burnt smell coming in the vents at stoplights?
First, be sure you don’t have the oil leak problem mentioned above. If not, You may have a problem with oil leaking from the O-ring seal around the tailshaft. It drips onto the Y-pipe and burns off with the odor being sucked into the ventilation system. Reports of replacing the seal (part # 8673526) and bushing (part # 6260048) seem to fix the problem. Check with your dealer as these parts are supposed to have been improved/upgraded.