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Q: The air condition on e500 works but when i turn the heat on it blows cold air. W on 2005 Mercedes-Benz E500

Where is the heating element on this car and is it something I can buy and fix without taking it ot the dealer.
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Under the hood next to the bulkhead on the left looking from the front of the car, you will find hot water pipes going into the heater unit. There is a valve with two wires going into it ( solenoid valve), it's stuck in the off position. Check for power, tap it , or change it. I had exactly the same prob. The valve is situated on one of the pipes, and is not easy to change. Hope this helps...
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