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  #1  
Old 12-03-2008, 09:26 PM
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Heated outside mirror.

My car's driver's side outside mirror is in permanent heat mode. Irrelevant of the outside temperature. The passenger side mirror is acting normally.

Normally the heated mirror function was comming on when the temperrature dipped below about 34F and then turned off automatically after about 20 Minutes or so. But as I said, now the driver's side mirror gets hot even in my garage.

What would cause that? Where is the thermostat for these mirrors?

The car is a 1995 E300D, (same as E320)

Thanks

Phillip

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  #2  
Old 12-03-2008, 09:29 PM
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The thermostat is in the mirror housing, stuck to the back of the mirror.
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Old 12-03-2008, 09:34 PM
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Thanks for the info Jeff.

Is the thermostat sold as a separate item by Mercedes? Is it easily replaceable?

If not, I suppose that I can get a switch, and control the mirror's heating function that way.

Thanks

Phil
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Old 12-03-2008, 09:42 PM
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My Toyota had them wired to the rear defroster. I thought that made more sense. Maybe you could just wire it to that circuit.
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  #5  
Old 12-03-2008, 09:44 PM
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I believe it is available as an assembly: the mirror glass with the heater laminated and integrated thermostat on a plastic mounting plate. In other words, the mirror glass comes with it (we used to make the EC version).
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Old 12-03-2008, 09:45 PM
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I suppose that I could wire them to the rear defroster, but that gets too complicated for me. Probably the easiest way, is either to change the thermostat (if possible), or install a small On/Off switch right near the mirror, on the inside of the car.

Actually, now that i know where the thermostat for the mirror is, I am going to blow some hot air from a hair dryer into the mirror assembly. If I am lucky, maybe the heat from the fryer will unstick the thermostat.
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  #7  
Old 12-03-2008, 10:08 PM
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I would assume it is solid state but maybe not.
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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  #8  
Old 12-03-2008, 10:16 PM
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This one might work. Turns on around 40F, turns off around 60F.

http://www.mouser.com/Search/ProductDetail.aspx?qs=UmzvcGcLxU%2fVNsMNGeyMLA%3d%3d

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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