Check The Low-Temperature Circuit For Leaks - AR09.41-P-1011XGA

Engine 176 in Model 463 from model 2019

Engine 177 in Model 463 from model 2019

Shown on engine 176 of the 463 series up to model year 2019

Courtesy of MERCEDES-BENZ USA

	Risk of injury on skin and eyes from scalding with healing coolant spurting out.Risk of poisoning by swallowing coolant	Open the cooling system only at coolant temperatures below 90 ° C. Slowly open the lid and release the excess pressure. Do not pour cool liquid into drinking containers. Wear protective gloves, protective clothing and protective goggles.	AS20.00-Z-0001-01A
	Notes on coolant		AH20.00-N-2080-01A
	Remove
1	Remove the lower engine compartment panels		AR61.20-P-1105XG
2	Remove the cap on the expansion tank (1)
	Check
3	Coolant level and antifreeze content of the coolant in the low-temperature circuit	Engine176 in Model 463 from model 2019 cooling system	*BF20.00-P-1001-06A
	Check and correct if necessary	Engine 177 in Model 463 from model 2019 cooling system	*BF20.00-P-1001-02LA
		Mixing ratio coolant	*BF20.00-P-1001-04A
4	Attach the test cap (2) to the expansion tank for the low-temperature circuit (1)	Test cap	Fig 1
5	Connect the pressure pump (3) to the test cap (2)	Pressure pump	Fig 2
6	Apply test pressure to the low-temperature circuit for 2 minutes	Do not exceed the specified test pressure. Otherwise the low-temperature circuit will be damaged.
		There must be no loss of pressure within the 2 minutes. Test pressure for pressing the low-temperature circuit	*BE20.30-P-1001-01D
7	Carry out a visual inspection of components carrying coolant	If there is a loss of pressure.
		Check all coolant-carrying components and connection points for condition and loss of coolant and, if necessary, eliminate the loss of coolant by taking appropriate measures.
8	Pressure release button on pressure pump (3)	Activate the pressure pump and release the pressure	Fig 2
9	Pressure pump (3) on the test cap (2)	Disconnect the pressure pump	Fig 2
10	Remove the test cap (2) from the expansion tank for the low-temperature circuit (1)	Test cap	Fig 1
11	Check the coolant level and antifreeze content of the coolant and correct if necessary	Engine 176 in Model 463 from model 2019 cooling system	*BF20.00-P-1001-06A
		Engine 177 in Model 463 from model 2019 cooling system	*BF20.00-P-1001-02LA
		Mixing ratio coolant	*BF20.00-P-1001-04A
	Install
12	The sealing cap on the expansion tank Attach the low-temperature circuit (1)
13	Install the lower engine compartment panels		AR61.20-P-1105XG

TESTED COOLING SYSTEM

Nummer	Designation			Engine 176	Engine 177
BE20.30-P-1001-01D	Test pressure for pressing the low-temperature circuit	Overpressure	bar	1, 4	1, 4

COOLING SYSTEM

Nummer	Designation				Engine 177 in Model 463 From Model 2019
BF20.00-P-1001-02LA	Cooling system	Workshop change quantity	Main circuit	Liter	≈ 13, 7
		Workshop change quantity	NT cycle	Liter	≈ 6, 6
		Antifreeze / water	to -37°C	%	50/50
			from -38°C	%	55/45
			Operating material regulations sheet		BB00.40-P-0310-01A
			Operating material regulations sheet		BB00.40-P-0325-06A
			Operating material regulations sheet		BB00.40-P-0326-06A

MIXING RATIO COOLANT

Nummer	Designation				All engines, except engine 178 in type 190.381
BF20.00-P-1001-04A	Mixing ratio coolant	Antifreeze / water	to -25°C	%	-
			to -37°C	%	50/50
			from -38°C	%	55/45
			Sheet overview and regulations		BB00.40-P-0310-01A
			References to sheet regulations		BB00.40-P-0310ZZ

COOLING SYSTEM

Nummer	Designation				Engine 176 in Model 463 from model 2019
BF20.00-P-1001-06A	Cooling system	Workshop change quantity	Main circuit	Liter	≈13
		Workshop change quantity	NT cycle	Liter	≈ 4, 6
		Antifreeze / water	to -37°C	%	50/50
			fromt -38°C	%	55/45
			Operating material regulations sheet		BB00.40-P-0310-01A
			Operating material regulations sheet		BB00.40-P-0325-06A
			Operating material regulations sheet		BB00.40-P-0326-06A

Fig 1: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA