Coolant Temperature Sensor.
Compatible with ALL Sprinters, T1N and NCV3, years 2001-2018, engines OM611, OM612, OM647, OM651, and OM642.
Located on the thermostat housing and/or on the intake manifold, depending upon the model year. 90 degree electrical plug connection. Held in place by metal clip.
A new o-ring seal is included.