HVAC Oder Due to Mildew in Heater Box on Mercedes-Benz C230

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: 88,892 (45,000–140,000)
7 model years affected: 1999, 2002, 2003, 2004, more2005, 2006, 2007
15 people reported this problem
4 people shared problem details
The car's AC has an awful vinegar smell that is pretty constant. After running for a WHILE, it gets a little better but not really. The problem has not been fixed, just tolerated.
Smelly mildew hvac
car makes everyone cough
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