Remove/install/replace heater circulation pump - AR83.25-P-1170CW

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MODEL 204.0/2 with ENGINE 271, 272, 274, 276, 642, 646, 651

MODEL 204.3 with ENGINE 271, 274, 276, 651

MODEL 204.9 with ENGINE 272, 274, 276, 642, 651

MODEL 207 with ENGINE 272, 273, 274, 276, 642, 651

MODEL 212 with ENGINE 157, 272, 273, 274, 276, 642, 651

MODEL 218 with ENGINE 157, 274, 276, 642, 651

MODIFICATION NOTES

26.9.14

coolant mixing ratio

BF20.00-P-1001-04A

Shown on MODEL 204.0 with CODE 875 (Heated windshield washer system)

Fig 1: Heater Circulation Pump Remove/Install Components

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
	Remove/install
1	Carefully open cap at coolant expansion reservoir and close again
2	Clamp off hot water hoses (2) using pinch-off pliers (3)
3	Clamp off heater hose (4) using pinch-off pliers (5)	MODEL 204, 207, 212, 218 with CODE 875 (Heated windshield washer system)
4	Release clamps from hot water hoses (2) and retract	Tools for installing/removing cooling and heating hoses
5	Slacken clamp at hot water hose (4) and pull back	MODEL 204, 207, 212, 218 with CODE 875 (Heated windshield washer system) Tools for installing/removing cooling and heating hoses
6	Disconnect electrical connector (6)
7	Take out coolant circulation pump (M13/5) far enough out of bracket (1) for heater hoses (2, 4) to be pulled off
8	Disconnect heater hoses (2) from coolant circulation pump (M13/5)
9	Detach heater hose (4) from coolant circulation pump (M13/5)	MODEL 204, 207, 212, 218 with CODE 875 (Heated windshield washer system)
10	Remove coolant circulation pump (M13/5)
11	Install in the reverse order
12	Pour in coolant and bleed cooling circuit	MODEL 204.0/2 with ENGINE 271, 272, 274, 276, 642, 651 MODEL 204.3 with ENGINE 271, 274, 276, 651 MODEL 204.9 with ENGINE 272, 274, 276, 642, 651 MODEL 207 with ENGINE 272, 273, 274, 276, 642, 651 MODEL 212 with ENGINE 157, 272, 273, 274, 276, 642, 651 MODEL 218 with ENGINE 157, 274, 276, 642, 651	AR20.00-P-1142-04A
		MODEL 204.0/2 with ENGINE 646 Reuse clean coolant only.	AR20.00-P-1142-04AK
		Coolant mixing ratio	*BF20.00-P-1001-04A
		Test cap	Fig 2
		Test cap	Fig 4
		Cooler vacuum filling device	Fig 3
13	Check area of coolant circulation pump (M13/5) for leaks	Perform visual inspection.

COOLANT MIXING RATIO

Number	Designation			ENGINE ALL
BF20.00-P-1001-04A	Coolant mixing ratio	Antifreeze/water	up to -37°C	50/50
		Antifreeze/water	up to -45°C	55/45
		Specification		Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1

Fig 2: Identifying Test Cap (169 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

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