(Cooling sensor, Water Sensor, Sender Unit, Gauge sensor)

2 prongs, oval shaped

M104, M111, OM606 for Water temp. gauge
M156, M159 for Oil temp. & water temp.
OM642, OM648 for Fuel temperature (at injection pump)

OM642 for Oil Temperature 

CL, S, SL for Gauge sender (at Oil return distributor, ABC)
SLS for Transmission Oil

smart CDI for Fuel temp. (at oil filter housing)
Sprinter for Fuel temp. (at Inj. pump)