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  #1  
Old 08-13-2005, 08:43 PM
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Location: Banning CA
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Need some info

HI: Can you tell me what this is (see picture) I just bought my first diesel Mercedes it's a 1986 300SDL and it has no owner's manual.

Thank you in advance.

Jon.

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  #2  
Old 08-13-2005, 09:54 PM
1986 300sdl 1985 380se
 
Join Date: Aug 2005
Location: West Monroe LA
Posts: 484
I believe that this device is a method of adjusting your idle speed. There is a resistor inside the cap of this thing and you pull up on it and turn it to another number and it will make the idle go up or down. Not sure of which direction to turn it though as my idle speed is 630 rpm and that is the correct idle speed for my car, also a 1986 300sdl.
John
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Old 08-13-2005, 11:55 PM
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86dsl,

I would like to know what it is too.

P E H
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  #4  
Old 08-14-2005, 06:58 AM
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Location: Syracuse, NY
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It fine tunes your Idle Speed.......

IIRC - each number is about 50 RPM - Higher the number - higher the idle.

Stephen

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