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  #1  
Old 11-01-2007, 06:12 PM
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Location: Carmel, CA
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Angry 1980 300sd.....no Heat

Last winter lots of heat no problem. This fall ZERO heat and its getting cold fast. Where do I start looking for the problem before I get frost bite driving to work.

Thanks!!!

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1973 280 - Sold
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1988 300E - Sold
1989 260E - Sold
1989 560SEL
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  #2  
Old 11-01-2007, 06:45 PM
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Location: Reno/Sparks, NV
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It could be your heater valve, faulty climate control unit, or air or clogging in your heater core. My bet would be on the heater valve unless you had someone mess with your cooling system since last winter.
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  #3  
Old 11-01-2007, 07:14 PM
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85 300D 4spd+tow+h4
 
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Location: Atl Gawga
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The dreaded servo unit..., There are great step by step testing instruction in the FSM available from MBUSA.com for $20, boy do I sound like a commercial. GL. Servo unit is the suck all of W123's. Thanks Chrysler!
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  #4  
Old 11-01-2007, 07:34 PM
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Join Date: Aug 2005
Location: Palmdale/Ventura, CA
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I have the servo in my 1980.
For years I used the bypass hose method.

Cost maybe $5 and leaves hot water flowing all the time.

Putting in the bypass hose will tell you if the servo is not behaving
and gives heat.

If the hose bypass does not work it could be something else.
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  #5  
Old 11-02-2007, 12:12 AM
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Location: Carmel, CA
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how/where do i put in a bypass hose? anyone have pics available?

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1973 280 - Sold
1980 300SD - Sold
1982 240D - Stolen
1988 300E - Sold
1989 260E - Sold
1989 560SEL
1994 E420 - Sold
1997 E420
2005 CL500
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