Inspect Cooling System For Leaks - AR20.00-P-1010MNF

Engine 176 in model 463 up to model year 2019

Engine 279, 642 in model 463

Shown on engine 176

Fig 1: Cooling System Components Location - Engine 176 In Model 463 Up To Model Year 2019

Courtesy of MERCEDES-BENZ USA

	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
	Notes on coolant level		AH20.00-P-1142-01CW
	Remove
1	Switch on ignition
2	Adjust heater to maximum heat output
3	Slowly unscrew cap on coolant expansion reservoir (1) and reduce overpressure
4	Check coolant level and antifreeze content coolant	Engine 279 in model 463Cooling system	*BF20.00-P-1001-02GA
		Engine 642 in model 463 (except 463.348) Engine 642 in model 463.348Cooling system	*BF20.00-P-1001-02W
		Engine 176 in model 463 up to model year 2019Cooling system	*BF20.00-P-1001-06A
5	Screw tester cap (2) onto coolant expansion reservoir (1)	Test cap	Fig 2
6	Connect pressure pump (3) at tester cap (2)	Pressure pump	Fig 3
7	Apply a test pressure to the engine cooling system for 2 minutes	Do not exceed the specified test pressure. Damage can occur on the engine cooling system otherwise.
		There should be no pressure loss within a period of 2 minutes.
		Engine 279, 642 in model 463 1-stage cover latch Test pressure for pressure-testing the engine cooling system	*BE20.30-P-1005-01A
		Engine 176 in model 463 up to model year 2019Test pressure for pressure-testing the cooling system In the event of pressure loss ↓ Perform a visual inspection on the assembly parts carrying coolant. Check condition and coolant loss for all assembly part carrying coolant and connections and remove coolant loss if necessary using suitable measures.	*BE20.30-P-1002-01D
	Install
8	Remove overpressure over the valve at the pressure pump (3) and remove pressure pump (3)	Pressure pump	Fig 3
9	Unscrew tester cap (2) at coolant expansion reservoir (1)	Test cap	Fig 2
10	Switch off ignition
11	Check coolant level and antifreeze content coolant	Engine 279 in model 463Cooling system	*BF20.00-P-1001-02GA
		Engine 642 in model 463 (except 463.348) Engine 642 in model 463.348Cooling system	*BF20.00-P-1001-02W
		Engine 176 in model 463 up to model year 2019Cooling system	*BF20.00-P-1001-06A
12	Screw cap onto coolant expansion reservoir (1)

COOLING SYSTEM CHECK VALUES

Number	Designation			Engine 176
BE20.30-P-1002-01D	Test pressure for pressure-testing the cooling system	Overpressure	bar	1, 4

RADIATOR OR EXPANSION RESERVOIR CAP

Number	Designation		1-stage cover latch	Engine 100, 102, 103, 104, 110, 111, 112, 113, 114, 115, 116, 117, 119, 120, 121, 123, 127, 129, 130, 133, 137, 139, 152, 155, 156, 157, 159, 166, 180, 256, 260, 264, 266, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 282, 285 2-stage latch cover Engine 601, 602, 603, 604, 605, 606, 607, 608, 611, 612, 613, 615, 616, 617, 621, 626, 628, 629, 640, 642, 646, 648, 651, 654, 656, 668 2-stage latch cover
BE20.30-P-1005-01A	Test pressure for pressure-testing the engine Overpressure cooling system	bar	1, 4	1, 4

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		BB00.40-P-0310-01A
			Specifications for Operating Fluids		BB00.40-P-0325-06A
			Specifications for Operating Fluids		BB00.40-P-0326-06A

COOLING SYSTEM

Number	Designation				Engine 642 in model 463 (except 463.348)	Engine 642 in model 463.348
BF20.00-P-1001-02W	Cooling system	Workshop replacement amount	Main circuit	I	≈ 10, 5	≈ 8, 6
		Workshop replacement amount	Low-temperature circuit	I	-	≈ 1, 2
		Antifreeze/water	Down to -37°C	%	50/50	50/50
			-38°C and below	%	55/45	55/45
			Specification		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specification		BB00.40-P-0325-00A	BB00.40-P-0325-06A
			Specification		BB00.40-P-0326-00A	BB00.40-P-0326-06A

COOLING SYSTEM

Number	Designation				Engine 176 in model 463 up to model year 2019	Engine 176 in model 463 as of model year 2019
BF20.00-P-1001-06A	Cooling system	Workshop replacement amount	Main circuit	Liter	≈ 6, 4	≈ 13
		Workshop replacement amount	Low-temperature circuit	Liter	≈ 1, 5	≈ 4, 6
		Antifreeze/water	Down to -37°C	%	50/50	50/50
			-38°C and below	%	55/45	55/45
			Specifications for Operating Fluids		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specifications for Operating Fluids		BB00.40-P-0325-06A	BB00.40-P-0325-06A
			Specifications for Operating Fluids		BB00.40-P-0326-06A	BB00.40-P-0326-06A

Fig 2: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA