Question about 1991 Mercedes-Benz 300 Diesel

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DUAL HEATING A/C SYSTEM

Good evening

AC/ Problem

Left side blows cool and right side blows heat, while on max AC. This car has a left and right temp control.

Thanks
Dave

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  • nthai Jun 25, 2008

    hi i also have the same problem.i bought mine ( an e200 1991 124 post face lift) second hand with the pipes to the heater cut but the after connecting i realised that the left side is controllable but the right side is not

  • Anonymous May 02, 2009

    i have a 300D `86 WHEN I DRIVING UP HILL START TO HEAT UP, AND ON THE RIGTH FENDER BOTOM PART START TO BOIL WATER AND LEAK.
    IT IS A WATER CONTAINER IN THERE?

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You have a vacuum leak to the heater controller. Check vacuum line (green and white) between engine and control valve (yellow) just above master cylinder

Posted on Jul 11, 2008

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Bad fuses

Posted on Jul 03, 2008

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