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

ENGINE 157, 276, 278, 642, 651 in MODEL 166

MODIFICATION NOTES

26.9.14

Coolant mixing ratio

BF20.00-P-1001-04A

Shown on model 166 with engine 278

Fig 1: Draining Coolant - Shown On Model 166

Courtesy of MERCEDES-BENZ USA

Engine 276

Fig 2: Identifying Coolant Pump, Drain Hose, Coolant Pump Drain Screw

Courtesy of MERCEDES-BENZ USA

	Drain off
	Risk of injury to skin and eyes suffering scalding from contact with hot coolant spray. 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
1	Unscrew cap (2) from coolant expansion reservoir (4)	Turn cap slowly and release overpressure, then unscrew cap (2).
2	Remove corresponding underfloor paneling		AR61.30-P-1001GQ
	Drain coolant at radiator
3	Push drain hose (3) onto left fitting (3a) on radiator (6)
4	Open drain screw (7) at radiator (6) and drain off coolant	Observe regulations to dispose of coolant.
5	Drain coolant from coolant pump (1)	ENGINE 276
6	Drain coolant at coolant line for turbocharger	ENGINE 157, 278 Unfasten drain screw from coolant line to ATL.
7	Unfasten coolant pump drain screw (5) at coolant pump (1)
8	Push drain hose (3) onto coolant pump drain screw (5)
9	Open coolant pump drain screw (5) at coolant pump (1) and drain off coolant
	Pour in
10	Tighten drain screw (7) on cooler (6) and detach drain hose (3) from fitting (3a)
11	Tighten coolant pump drain screw (5) at coolant pump (1) and detach drain hose (3) from fitting	ENGINE 276
11		Drain screw on coolant pump	*BA20.10-P-1008-01AA
12	Pour in coolant and bleed cooling system		AR20.00-P-1142-04A
	Notes on coolant level		AH20.00-P-1142-01CW
	Coolant specifications	Specification 310.1	Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1
	Anticorrosion/antifreeze agents (Sheet 325.0)	Specification 325.0 Re-use clean coolant.	Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1
		Coolant mixing ratio	*BF20.00-P-1001-04A
		Test cap	Figure
		Cooler vacuum filling device	Fig 3
13	Check cooling system for leak tightness		AR20.00-P-1010GQ
	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
14	Perform an engine test run and check cooling system for proper operation

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

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA