I haven't seen the FSM, but I have been told by several independent sources that one sensor is for the gauge, whereas the other water temp sensor is just a temperature switch directly related to the glow plug duration. I could be wrong, but I do know first hand you cant switch them around and have your gauge work.

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1985 MBZ 300D (DD, 240k, unmuffled hellion!)
1982 MBZ 300D (372k, retired for parts)
1981 MBZ 300D (575k, parts pig)

When I was having an over heating problem according to the gauge, my Indy mentioned to swap the two wires to see if the gauge changed, then I would know it could be the sensor. from that I thought they were the same Sensor, could be used in either hole.

Swapped the wires and the gauge read the same. was another problem I finally chassed down


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works