Drain/fill low-temperature circuit coolant - AR09.41-P-6834MNZ

ENGINE 279 in MODEL 463

Shown on MODEL 231

Fig 1: Cap, Engine Cover And Low-Temperature Circuit Coolant Expansion Reservoir - Shown On Model 231

Courtesy of MERCEDES-BENZ USA

Shown on MODEL 463

Fig 2: Drain Screw And Additional Engine Radiator - Shown On Model 463

Courtesy of MERCEDES-BENZ USA

	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
	Remove
1	Open engine hood		AR88.40-P-1000GG
2	Remove engine cover (3)
3	Raise vehicle		AR00.60-P-1000G
4	Remove lower engine compartment paneling	Model 463 with engine 279 as of model year 2016 except code ZQ0 (G 500 4x4² )	AR61.20-P-1105GW
	Drain off
5	Unscrew cap (1) on low-temperature circuit coolant expansion reservoir (2)
6	Open drain screw (4)	Catch coolant in a suitable container. Replace drain screw (4) and seal.
	Pour in
7	Tighten drain screw (4)	Drain screw to additional engine radiator low-temperature circuit	*BA20.20-P-1003-01P
8	Add coolant and bleed low-temperature circuit		AR20.00-P-1142-04A
		Use clean coolant.
		Cooling system	*BF20.00-P-1001-02GA
		Electric vacuum pump	Fig 3
		NTKL Adaption	Fig 4
		Cooler vacuum filling device	Fig 5
		Test cap	Figure
	Check
9	Check low-temperature circuit for leaktightness		AR09.41-P-1011MUD
10	Check coolant level	The coolant level in a cold engine must be level with the marking (arrow) in the coolant expansion reservoir for the low-temperature circuit (2). When the coolant is warm, about 1 cm (0.39 inch) above the marking.
11	Tighten down cap (1) on low-temperature circuit coolant expansion reservoir (2)
	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
12	Perform an engine test run and check cooling system for proper operation
	Install
13	Install lower engine compartment paneling	Model 463 with engine 279 as of model year 2016 except code ZQ0 (G 500 4x4² )	AR61.20-P-1105GW
14	Lower vehicle		AR00.60-P-1000G
15	Install engine cover (3)
16	Close engine hood		AR88.40-P-1000GG

RADIATOR, COOLANT HOSES

Number	Designation			Engine 279
BA20.20-P-1003-01P	Drain screw to additional engine radiator low-temperature circuit	M12	Nm	30

COOLING SYSTEM

Number	Designation				Engine 279 in model 463
BF20.00-P-1001-02GA	Cooling system	Workshop replacement amount	Main circuit	Liter	≈ 14, 0
		Workshop replacement amount	Low-temperature circuit	Liter	≈ 5, 0
		Antifreeze/water	Down to -37°C	%	50/50
			-38°C and below	%	55/45
			Specifications for Operating Fluids, sheet		Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1
			Specifications for Operating Fluids, sheet		Anticorrosion agent/antifreeze (Specification 325.6). See https://bevo.mercedes-benz.com/index.php?language_id=1
			Specifications for Operating Fluids, sheet		Premixed coolant (Specification 326.6). See https://bevo.mercedes-benz.com/index.php?language_id=1

Fig 3: Identifying Electric Vacuum Pump (285 589 02 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying NTKL Adaption (285 589 01 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Cooler Vacuum Filling Device (285 589 00 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA