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#1
06-25-2014, 08:27 AM
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W140 S350 - Relay Location?
For the Electronic Switchover valve bolted to the intake?
I am not getting 12 volts to the unit in any key position. The fuse is good, so need to check the relay. Just not sure which one it is. Thanks
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1987 300SDL #1, 1987 300SDL #2, 1980 240D, 1982 300SD, 1994 S350, 1990 350SDL, 1991 350SD, 1985 300D, 2005 E320CDI Gone, but not forgotten: 1981 300SD, 1982 300SD, 1987 300SDL, 1983 300TD, 1980 300CD, 1981 300SD #2, 1987 300D, 1987 300TDT, 1980 300D Last edited by jusme; 06-25-2014 at 08:55 AM. 
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#2
06-25-2014, 06:25 PM
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It is one far back in the fuse box.You need to remove wiper relay,fuse box lid,then unscrew two bolts holding the upper cower,and remove it.Then you will see bunch of relays in there.It should be the one in the midlle in the last row.I am not 100% sure,for the position but it is one of them,I had that same problem month ago
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Mercedes W140, S350TD, 95. Mercedes W140, S350, 92. Porsche 944, 86 N/A. Porsche 944, 85 N/A automatic. Porsche 944, 84 N/A. Porsche 944, 83 N/A. Opel GT, 73. Toyota Supra MA61,84.
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#3
06-26-2014, 01:19 PM
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Thanks!
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1987 300SDL #1, 1987 300SDL #2, 1980 240D, 1982 300SD, 1994 S350, 1990 350SDL, 1991 350SD, 1985 300D, 2005 E320CDI Gone, but not forgotten: 1981 300SD, 1982 300SD, 1987 300SDL, 1983 300TD, 1980 300CD, 1981 300SD #2, 1987 300D, 1987 300TDT, 1980 300D
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#4
07-04-2014, 08:22 PM
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Well, had some time today to further diagnose. Turns out I had a bad ground in the harness going to the shutoff solenoid. I had power, but the ground was faulty, I can only assume the wiring harness issues that plagued these models was the culprit. Ran a fresh ground, and now works perfect. Thanks to all who contributed.
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1987 300SDL #1, 1987 300SDL #2, 1980 240D, 1982 300SD, 1994 S350, 1990 350SDL, 1991 350SD, 1985 300D, 2005 E320CDI Gone, but not forgotten: 1981 300SD, 1982 300SD, 1987 300SDL, 1983 300TD, 1980 300CD, 1981 300SD #2, 1987 300D, 1987 300TDT, 1980 300D
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Linear Mode
