The heating, ventilation and AC (HVAC) heater box is susceptible to mildew buildup. This can result in a musty odor from the HVAC system, most noticeable when the system is first turned on.Google+
Car Problem Reports
Mercedes-Benz CLK350 Mildew in Heater Box
Mercedes-Benz CLK350 Problem
Average Mileage: 42,087 mi (20,000 mi - 85,000 mi)
Visitor, 2007 Mercedes-Benz CLK350, 24,000 mi
I have the same issue. how do i get to the source of the problem and fix it.
Visitor, 2007 Mercedes-Benz CLK350, 41,700 mi
Definitely a strong odor coming from the HVAC system that makes it a little embarassing to have others ride along in your "luxury" automobile. Any advice on how to completely correct this would be appreciated.
Visitor, 2008 Mercedes-Benz CLK350, 29,000 mi
heavy a/c use during warm weather causing bad mildew smell especially at startup
Same situation, Contacted dealer paid 250.00 for the service at the Grapevine TX dealer ship. Cost of service included, the air filter change, and to flush the system with a solvent, to help eliminate the odor...Smell came back with in 60 days.
Visitor, 2009 Mercedes-Benz CLK350, 34,000 mi
Crayon type smell in the HVAC system that is so pungent that the wife can't even stand to be in the car.