HVAC Oder Due to Mildew in Heater Box on Mercedes-Benz C350 4MATIC

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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Average mileage: 180,000 (180,000–180,000)
2 model years affected: 2006, 2007
3 people reported this problem
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