Remove/install temperature sensor - AR15.60-P-3000SMG

ENGINES 156 in MODEL 216, 221 

Fig 1: Identifying Coolant Temperature Sensor Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by 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
	Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Information on preventing damage to electronic components due to electrostatic discharge	All models	AH54.00-P-0001-01A
1	Switch ignition off, remove ignition key (transmitter key).	On vehicles with Keyless Go, code 889: Press keyless go start/stop button repeatedly until ignition is switched off. Remove keyless go transmitter card or transmitter key from vehicle and store outside of transmission range (min. 2 m)
2	Open engine hood
3	Remove left and right intake air duct
4	Remove front engine cover	Do not tilt front engine cover, but lift upwards vertically otherwise the retaining lugs can break off.
5	Detach air hose (3) from air shutoff valves
6	Unclip air hose (3) and place to one side
7	Remove poly-V belt (4)
8	Remove guide pulley (5) from coolant pump		*BA13.25-P-1004-01U
9	Raise vehicle with vehicle lift		AR00.60-P-1000SX
10	Remove bottom engine compartment paneling	Vehicles without code (Z07) Top protection Installation:  Only install lower engine compartment paneling after leak test.	AR61.20-P-1105SX
11	Drain coolant at radiator		AR20.00-P-1142SMG
	Notes on coolant	All engines	AH20.00-N-2080-01A
		Coolant	*BF20.00-P-1001-02U
12	Unlock and disconnect electrical connector (6) on coolant temperature sensor (B11/4)
13	Remove coolant temperature sensor (B11/4) from cylinder head	Installation:  Replace sealing ring.	*BA15.60-P-1002-01C
14	Install in the reverse order
15	Pour in coolant and bleed cooling system		AR20.00-P-1142SMG
16	Conduct engine test run and check engine for leaks

TEMPERATURE SENSOR

Number	Designation		Engine 156, 159
BA15.60-P-1002-01C	Coolant temperature, temperature sensor on cylinder head	Nm	21

BELT TENSIONING DEVICE

Number	Designation		Engine 156, 159
BA13.25-P-1004-01U	Guide pulley to coolant pump housing (between alternator and smooth guide pulley)	Nm	20

COOLING SYSTEM

Number	Designation			Engine 156 in model 216, 221
BF20.00-P-1001-02U	Cooling system	Total filling capacity	≈Liters	10
		Antifreeze/water	Up to -37°C	50/50
			up to -45°C	55/45
		Specifications for Operating Fluids	Sheet	BB00.40-P-0310-01A
			Sheet	BB00.40-P-0325-00A