Car Problem Reports

Mercedes-Benz CLK350 Mildew in Heater Box

Mercedes-Benz CLK350 Problem
12 Reports
Me Too

Model Years Affected: 2006, 2007, 2008, 2009

Average Mileage: 42,087 mi (20,000 mi - 85,000 mi)


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.

  • Visitor, , 24,000 mi

    I have the same issue. how do i get to the source of the problem and fix it.

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  • Visitor, , 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.

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  • Visitor, , 29,000 mi

    heavy a/c use during warm weather causing bad mildew smell especially at startup

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  •  Rookie

    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.

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  • Visitor, , 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.

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