BenzWorld Junior Member
Date registered: Jun 2011
Vehicle: 2003 E-320 Sedan
Location: Phoenix - thankfully MB makes good A/C systems
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Yup ... the old Heater Control Valve bites you in the a*%*^(. Like you, mine had probably not been used in years (in AZ), but you'd be surprised how cold it gets here on winter mornings. My indie replaced it, and everything is fine ... not cheap but not the worst case scenario, either. This issue got me to thinking: it makes a case for operating every item in the car (or as many as one can think of) occasionally - just to keep it lubed or to check that it is functioning.
Last edited by wishihadahorse; 12-13-2011 at 04:40 PM.