So I just finished changing the pre-filter on my 87 190d and I noticed this connector was loose, without any place to connect it to. Does any one know where it is supposed to go? I thought maybe the ac compressor, but all wires going to it appear to be in place.

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Looks like it goes to the AC compressor.

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85 250D euro
87 300D

AC Compressor

Thanks.
I took a second look, and indeed, there is a place for it on the top of the compressor.

I notice you have red fuel in the prefilter.

Not worried about a dip stop?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

vstech: actually that's just regular S500 diesel. Around here, S500 must be red, so it is not confused with S10 diesel.