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Old 09-14-2009, 09:24 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
I took apart the intake manifold and i checked the intake flap and there is no binding or scoring against the sides,it moves freely i dont understand what you ment by putting a magnet over the bolt cuz theres already a magnet over it? Could you explain further, also i dont know which sensor is the right one for the temp sensor is it one unit or 4 little ones. PLease help, pictures would be great thanks
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Old 09-15-2009, 08:02 AM
Cal Learner's Avatar
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Join Date: Aug 2006
Location: Marysville, CA
Posts: 781
Allen, the temp sensor involved in these tests is located at the very back of the engine, on the driver side of the valve cover. It's either connected to a big black electrical connector as shown in the photo below, or it's connected to two wires and looks like the photo dlevitt posted in post #34 above. There was a production change in '88 or '89. The big black one is referred to as the 4-pin sensor, the green one is a 2-pin sensor; it's one or the other, but they operate in exactly the same manner. The procedure for testing the 4-pin sensor is what I gave you in my last post above. The test for the 2-pin is slightly different, as shown in the image below.
Attached Thumbnails
OVP help,, simple question-p4305510x.jpg   OVP help,, simple question-cts-test2.jpg  
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1988 California version 260E (W124)
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Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

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Last edited by Cal Learner; 09-15-2009 at 08:08 AM.
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