Check Low-Temperature Circuit Cooling System For Leaks - AR09.41-P-1010MLJ

Engine 157, 276, 278 in model 166, 292 

MODIFICATION NOTES

06.07.2015	Cooling system	ENGINE 278 in MODEL 166	BF20.00-P-1001-02EA
06.07.2015	Cooling system	Engine 278 in Model 166	BF20.00-P-1001-02EA

Shown on engine 278 

Courtesy of MERCEDES-BENZ USA

	Remove
1	Remove upper engine cover
2	Unscrew cap on low-temperature circuit coolant expansion reservoir (1)
	Check
3	Check coolant level and antifreeze content coolant in low-temperature circuit	In a case of the antifreeze content of the coolant being too low ↓ Add antifreeze or replace the coolant
4	Screw tester cap (2) onto low-temperature circuit coolant expansion reservoir (1)	Test cap	Fig 2
5	Connect pressure pump (3) at tester cap (2)	Pressure pump	Fig 1
6	Apply pressure to the low-temperature circuit	Do not exceed the specified test pressure. Damage can occur on the engine cooling system otherwise.
7	Perform a visual inspection on the components carrying coolant	Check condition and coolant loss for all coolant carrying components and connections
8	Actuate pressure relief button (4) on pressure pump (3) and relieve the pressure	Pressure pump	Fig 1
	Install
9	Detach pressure pump (3) at tester cap (2)
10	Unscrew tester cap (2) at low-temperature circuit coolant expansion reservoir (1)
11	Check coolant level and antifreeze content coolant	Engine 278 in model 166 Engine 278 in model 292Cooling system	*BF20.00-P-1001-02EA
		Engine 157 in model 166	*BF20.00-P-1001-02FA
		Engine 157 in model 292.374 Engine 157 in model 292.375Cooling system
		Engine 276 in model 166 Engine 276 in model 292Cooling system	*BF20.00-P-1001-02BA
12	Screw cap onto low-temperature circuit coolant expansion reservoir (1)
13	Install upper engine cover

COOLING SYSTEM

Number	Designation				Engine 276 in model 166 except code ME05 (HYBRID DRIVE 80 kW VARIANT (INCLUDING PLUGIN))	Engine 276 in model 166 with code ME05 (HYBRID DRIVE 80 kW VARIANT (INCLUDING PLUGIN))
BF20.00-P-1001-02BA	Cooling system	Workshop replacement amount	Main circuit	L	≈ 10, 5	≈9, 7
			Low-temperature circuit	L	≈1, 9	≈6, 0
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38°C	%	55/45	55/45
			Specifications for Operating Fluids, sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specifications for Operating Fluids, sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specifications for Operating Fluids, sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

COOLING SYSTEM

Number	Designation				Engine 276 in model 292
BF20.00-P-1001-02BA	Cooling system	Workshop replacement amount	Main circuit	L	≈10, 5
			Low-temperature circuit	L	≈1, 9
		Antifreeze/water	Up to -37°C	%	50/50
			As of -38°C	%	55/45
			Specifications for Operating Fluids, sheet		BB00.40-P-0310-01A
			Specifications for Operating Fluids, sheet		BB00.40-P-0325-00A
			Specifications for Operating Fluids, sheet		BB00.40-P-0326-00A

COOLING SYSTEM

Number	Designation				Engine 278 in model 166	Engine 278 in model 292
BF20.00-P-1001-02EA	Cooling system	Workshop replacement quantity	Main circuit	Liter	≈11, 4	≈11, 4
			Low temperature circuit	Liter	≈2, 5	≈2, 5
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38°C	%	55/45	55/45
			Specification		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specification		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specification		BB00.40-P-0326-00A	BB00.40-P-0326-00A

COOLING SYSTEM

Number	Designation				Engine 157 in model 166	Engine 157 in model 292
BF20.00-P-1001-02FA	Cooling system	Workshop change quantity	Main circuit	Liter	≈ 8	≈ 8
			Low-temperature circuit	Liter	≈ 2	≈ 2
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38°C	%	55/45	55/45
			Specification		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specification		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specification		BB00.40-P-0326-00A	BB00.40-P-0326-00A

Fig 1: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA

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

Courtesy of MERCEDES-BENZ USA