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Mercedes-Benz C320 4MATIC Problems

HVAC Oder Due to Mildew in Heater Box on Mercedes-Benz C320 4MATIC

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.

(3 people reported this problem)

Mercedes-Benz C320 4MATIC Vehicles With This Problem

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Average mileage: (–)
3 model years affected: 2003, 2004, 2005
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Brake problem? Or maybe a faulty head gasket cylinder?
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