Drain/pour in coolant - AR20.00-P-1142FH

ENGINE 276 in MODEL 204

ENGINE 276.9, 278 in MODEL 207

MODIFICATION NOTES

12.2.14	Work procedure altered and special tools for electrical vacuum pump and NTKL adaptation, added.	Operation steps 14 to 26	AR20.00-P-1142-04A
26.9.14	Mischungsverhaltnis Kuhlmittel		BF20.00-P-1001-04A

Fig 1: Identifying Coolant Expansion Reservoir Cap

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Radiator Drain Screw

Courtesy of MERCEDES-BENZ USA

Fig 3: Drive Belt Routing Diagram

Courtesy of MERCEDES-BENZ USA

	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	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
	Notes on coolant		AH20.00-N-2080-01A
	Drain off
1	Unscrew cap (1) on coolant expansion reservoir (2)	Unscrew cap (1) slowly and relieve overpressure.
2	Remove lower engine compartment paneling	ENGINE 276 in MODEL 204.0/2 ENGINE 276 in MODEL 204.3 ENGINE 276.9, 278 in MODEL 207	AR61.20-P-1105EW
2	Remove lower engine compartment paneling	ENGINE 276 in MODEL 204.9	AR61.20-P-1105CY
	Drain coolant at radiator
3	Slide drain hose (6) onto drain fitting (3)
4	Slacken drain screw on radiator (4) and drain coolant.	Remove radiator drain screw (4) until the coolant flows out. Permanent damage to the radiator drain screw (4) will occur otherwise. Catch coolant in a suitable container. Observe regulations to dispose of coolant.
5	Turn ignition key for about 5 s in ignition lock into position 1 and then turn key into position 0	ENGINE 278 in MODEL 207 Repeat this procedure twice after a waiting time of about 30 s in order to empty the low-temperature water circuit.
	Drain coolant from coolant pump
6	Loosen coolant pump drain screw (5)	ENGINE 276 in MODEL 204 ENGINE 276.9 in MODEL 207
6	Loosen coolant pump drain screw (5)	Drain screw on coolant pump	*BA20.10-P-1008-01AA
7	Push drain hose (6) onto coolant pump drain screw (5)	ENGINE 276 in MODEL 204 ENGINE 276.9 in MODEL 207
8	Continue to turn coolant pump drain screw (5) and drain off coolant	ENGINE 276 in MODEL 204 ENGINE 276.9 in MODEL 207 Observe regulations to dispose of coolant. Catch coolant in a suitable container.
	Pour in
9	Tighten down cooler drain screw (4) and detach drain hose (6) from drain fitting (3)
10	Tighten down coolant pump drain screw (5) and detach drain hose (6)	ENGINE 276 in MODEL 204 ENGINE 276.9 in MODEL 207
11	Pour in coolant and ventilate engine cooling system		AR20.00-P-1142-04A
	Notes on coolant level		AH20.00-P-1142-01CW
	Coolant specifications		Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1
	Anticorrosion/antifreeze agents (Specification 325.0)		Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1
		Re-use clean coolant.
		Coolant mixing ratio	*BF20.00-P-1001-04A
		Cooler vacuum filling device	Figure
		Test cap	Figure
		NTKL Adaption	Figure
		Electric vacuum pump	Figure
12	Turn ignition key for about 5 s in ignition lock into position 1 and then again turn key into position 0	ENGINE 278 in MODEL 207 Repeat this procedure twice after a waiting time of about 30 s in order to empty the low-temperature water circuit.
	Check
13	Check engine cooling system for leaktightness		AR20.00-P-1010FH
14	Install lower engine compartment paneling	ENGINE 276 in MODEL 204.9	AR61.20-P-1105CY
14	Install lower engine compartment paneling	ENGINE 276 in MODEL 204.0/2 ENGINE 276 in MODEL 204.3 ENGINE 276.9, 278 in MODEL 207	AR61.20-P-1105EW
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
15	Perform an engine test run and check engine cooling system for proper operation		AS00.00-Z-0005-01A

COOLANT PUMP, COOLANT THERMOSTAT

Number	Designation			ENGINE 276
BA20.10-P-1008-01AA	Drain screw on coolant pump	Stage 1	Nm	6
BA20.10-P-1008-01AA	Drain screw on coolant pump	Stage 2	∠°	90

COOLANT MIXING RATIO

Number	Designation			ENGINE ALL
BF20.00-P-1001-04A	Coolant mixing ratio	Antifreeze/water	to -37°C	50/50
		Antifreeze/water	to -45°C	55/45
		Specification		Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1

Fig 4: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Electric Vacuum Pump (285 589 02 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying NTKL Adaption (285 589 01 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 7: Identifying Cooler Vacuum Filling Device (285 589 00 21 00)

Courtesy of MERCEDES-BENZ USA