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Mercedes S Class Mercedes S350, Mercedes S430, Mercedes S500 and Mercedes S600 Sedans.

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Old 01-22-2008, 11:28 AM
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Default Heater valve

I have a problem with heating in my S500 1996. It blows only cold air on the driver's side. Passenger side works well. I guess it could be heater control valve, but I don't know where it's located. Any help would be appreciated in this cold weather.

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Old 01-23-2008, 12:10 AM
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Default RE: Heater valve

Is that the Silver Bullet/Cylinder looking things in the engine compartment under the plastic cover left side (wheel-well)? They look like a group of cylinders together. It's a rather expensive part! But if you need it, you need it. But could it be a problem with the temp control unit?
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Old 01-23-2008, 04:23 AM
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Default RE: Heater valve

Thanks for your reply. It could be the temp control. I'm not sure. I'm hoping that it's something simple that I can fix myself, instead of taking it down to the garage.
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