Car Problem Reports

Mercedes-Benz C240 4MATIC Mildew in Heater Box

Mercedes-Benz C240 4MATIC Problem
6 Reports
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Model Years Affected: 2003, 2004, 2005

Average Mileage: 247,500 mi (245,000 mi - 250,000 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.

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