duo valve

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    cl500 w215 climate control problem

    Hi, would just like to share my experience and subsequent fix of an annoying common problem. drivers side vent would always blow warm when aircon set very low. Passenger side worked ok. reading through various forums, it all pointed to problem with the duo valve, which controls left and right...
  2. D

    W211 heating issues

    Hello all, I was wondering if someone out there has any guidance on this little problem for me? I've recently bought a 2004 e270 w211 and since the purchase I've only been able to draw hot air through the vents on the passenger side. After some searching on here I learned of the common issues...

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