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

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 55,000 (50,000–60,000)
5 model years affected: 2006, 2007, 2008, 2009, more2010
8 people reported this problem