Drain/fill in coolant - AR20.00-P-1142GX

ENGINES 113.993 in MODEL 463.270 /271

ENGINES 273 in MODEL 463

ENGINES 642.975 in MODEL 461.304 /334 /344 /346

ENGINES 642.884 in MODEL 461.305 /333 /340 /343

Illustrated on model 463.270

Fig 1: Identifying Expansion Reservoir 2-Stage Cap

Courtesy of MERCEDES-BENZ USA

	Drain
	Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by 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
1	Open 2-stage cap (2) at expansion reservoir (1)	Rotate 2-stage cap (2) half a revolution in counterclockwise direction, release overpressure, then unscrew 2-stage cap (2).
2	Remove underride guard	Model 461, model 463 except model 463.271 with engine 113.993
2	Remove underride guard	Model 463.271 with engine 113.993	AR88.30-P-0010MG
3	Drain coolant	Insert drain hose (3a) with an internal diameter of 12 mm to the radiator, then open the radiator drain plug (3). Catch coolant with suitable vessel.
	Notes on coolant		AH20.00-N-2080-01A
	Filling
4	Pour in coolant	Model 463 with engine 113	*BF20.00-P-1001-02K
		Model 463 with engine 273	*BF20.00-P-1001-02U
		Model 461	*BF20.00-P-1001-02W
	Notes on coolant		AH20.00-N-2080-01A
	Notes on coolant level		AH20.00-P-1142-01V
5	Bleed cooling system	Run the engine, set the heater to full heating capacity.

COOLING SYSTEM

Number	Designation			Engine 113.993 in model 463.270/271
BF20.00-P-1001-02K	Cooling system	Total filling capacity	Liters	≈13.0
		Capacity of anticorrosion/antifreeze agent down to -37°C	Liters	≈6.5
		Filling capacity of anticorrosion/ antifreeze down to -45°C	Liters	≈7.3
		Specifications for Operating Fluids	Sheet	BB00.40-P-0310-01A
		Specifications for Operating Fluids	Sheet	BB00.40-P-0325-00A

COOLING SYSTEM

Number	Designation			Engine 273 in model 463
BF20.00-P-1001-02U	Cooling system	Total filling capacity	≈Liters	6
		Antifreeze/water	up to -37°C	50/50
		Antifreeze/water	up to -45°C	55/45
		Specifications for Operating Fluids	Sheet	BB00.40-P-0310-01A
		Specifications for Operating Fluids	Sheet	BB00.40-P-0325-00A

COOLING SYSTEM

Number	Designation			Engine 642 in model 461 without auxiliary heating	Engine 642 in model 461 with auxiliary heating
BF20.00-P-1001-02W	Cooling system	Workshop replacement quantity	≈Liters	12.0	12.6
		Antifreeze/water	up to -37°C	50/50	50/50
		Antifreeze/water	up to -45°C	55/45	55/45
		Service specifications	Sheet	BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Service specifications	Sheet	BB00.40-P-0325-00A	BB00.40-P-0325-00A