To be honest, I don't know what this is for on my 1991 300D. It was disconnected for I don’t know how long.

Could have been since august and a few thousand miles.

Now the reason why I ask “should I be concerned” is because the car runs and drives beautifully more or less all the time. It idles at the right speed, starts well, has boost (I believe), etc.

What is that connection for? Should some operation be affected?

Car runs so nicely.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

Is your cruise control working?

Been awhile since I have had a 602, but I think that could be the connecting rod to the cruise control actuator.

Sure others will chime in.

__________________

2023 Ram 1500
1987 300TD
2002 ML 320
2001 Chevy Suburban
2006 S430 (gone and trying to forget)
1985 300TD (returned to father)
2007 GL320 CDI (sold to brother)
1995 E320 (sold)
1991 500SL (parted out)
1995 E300D (RIP)
1991 300D (RIP)
1995 E320 Wagon (sold)
1992 300TE (sold)
1988 300CE (sold)
1994 E320 (sold)
1995 E300D (sold)
1978 300D (RIP)
1987 260E (sold)
1992 400E (parted out)
1989 300E (parted out)

Cuts out the ac compressor at full “throttle”

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"

Ok, is it a “throttle position sensor” that feeds cruise and Klima then?

Why can’t I seem to find anything on this item by searching??!?

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

Apparently one of the sensors is also for the EGR. I haven’t gone
To a pressure actuated wastegate yet.

Would no signal from this to the EGR affect the wastegate? I think I get boost. Or the car without is sufficiently peppy…

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)