Electrical Sensor Resistance Specs?

[ArborWrench]

I've searched the shop manual and this forum and can't find any specs for the electrical sensors. I'm rebuilding my engine and I would like to bench test the coolant/ oil sensors to make sure they are all within spec while I've got everything apart. Can anyone point me to these resistance specs?

[Frank Reiner]

AW:

Your inquiry will probably go better if you narrow the search by year and model of the engine and chassis!!

Coolant temp?
Oil level?, temp?, pressure?

[ArborWrench]

1982 380SL. Specifically looking for coolant sensors on fuel injection/ idle air systems.

[Frank Reiner]

AW:

Coolant temp sensor resistance:

0C - 5.9k ohms
90C - 247 ohms

[ArborWrench]

Thanks Frank. Is that in the shop manual anywhere or where did you find that?

Are all the coolant sensors the same resistance?

[Frank Reiner]

AW:

The resistance info is generic for Bosch/MB coolant temp sensors.

My K-jet/Lambda info does not extend specifically to 1982; it stops at 81. With that said, check your wiring diagrams for input connections for the frequency valve controller. K-Lambda typically sensed oil temp rather than water temp, however, yours may indeed sense water temp. If so, I would defer to the knowledge of meltedpanda or rowdie for that year of SL.