Remove/Install Coolant Temperature Sensor - AR15.60-P-2712MSA

Engine 256.9 In Model 213, 238, 257, 290 

Fig 1: Coolant Temperature Sensor Components Location - Engine 256.9 In Model 238

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from swallowing coolant.	Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/Install
1	Remove upper engine cover.		AR01.10-P-2405MSA
2	Drain off coolant.		AR20.00-P-1142MSA
3	Release and disconnect electrical connector of coolant temperature sensor (B11/4).
4	Remove screw (2).	Screw, temperature sensor bracket to cylinder head	*BA15.60-P-1001-02MRT
5	Remove coolant temperature sensor (B11/4) with bracket.
6	Install in the reverse order.
7	Read out and delete fault memory.
		Engine 256.9 in model 213	AD00.00-P-2000-04B
		Engine 256.9 in model 238	AD00.00-P-2000-06LWO
		Engine 256.9 in model 257, 290	AD00.00-P-2000-06FR

TEMPERATURE SENSOR

Number	Designation		Engine 256.9
BA15.60-P-1001-02MRT	Screw, temperature sensor bracket to cylinder head	Nm	8