Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration · ap2000w2010r · Mercedes-Benz WIS

AP20.00-W-2010R

Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

30.08.2019

Engine	457.9 in model 949
Engine	460.9 in model 959
Engine	926.9 in model 949

Modification notes

03.07.2019

Operation steps "Open/close engine hood" added.

Operation steps 1, 7.

Engine cooling system - check fluid level, adjust to correct level. Inspect
anticorrosion/antifreeze protection, adjust to correct concentration

Shown on model 949

1	Cap
2	Filler neck
3	Expansion reservoir
4	Drain screw

N20.30-2089-01

N20.30-2090-01

G20.00-A001-77

Shown on model 959

1	Cap		3	Expansion reservoir
2	Filler neck		4	Drain screw

 Warning	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
 Warning	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
Topical note	Notes on coolant		AH20.00-N-2080-01A
	Check
1	Open hood.
		Model 949	AR88.40-W-1000R
		Model 959	AR88.40-W-1000Z
2	Unscrew cap (1) from expansion reservoir (3).
3	Check fluid level.	 Check fluid level at a coolant temperature of less than 50 °C only. The fluid level is correct when the coolant is visible in the filler neck (2). Check anti-corrosion and antifreeze protection before correcting the fluid level.
4	Check anti-corrosion and antifreeze protection.	 To do so, remove required quantity of coolant, if necessary at cooler's drain screw (4).
		 Engine 457.9Coolant drain plug to radiator	*BA20.20-N-1003-01E
		 Engine 460.9Drain screw to engine radiator	*BA20.20-N-1001-02Z
		 Engine 926.9Coolant drain plug to radiator	*BA20.20-N-1001-01D
		 Engine 457.9Coolant	*BF20.00-N-1001-01T
		 Engine 460.9Coolant	*BF20.00-N-1001-01Z
		 Engine 926.9Coolant	*BF20.00-N-1001-01C
		If necessary,
		
		correct anti-corrosion and antifreeze protection.
			AP20.00-W-2010-01R
		 After obtaining special order.
5	Correct fluid level.	Only if the fluid level is too low.
		 Make sure that the mixing ratio of the coolant is correct.
		 Engine 457.9Coolant	*BF20.00-N-1001-01T
		 Engine 460.9Coolant	*BF20.00-N-1001-01Z
		 Engine 926.9Coolant	*BF20.00-N-1001-01C
6	Screw cap (1) onto expansion reservoir (3).
7	Close hood.	Only after all maintenance operations have been completed.
		Model 949	AR88.40-W-1000R
		Model 959	AR88.40-W-1000Z

 Radiator, coolant hoses

Number	Designation		ENGINE 926.9
BA20.20-N-1001-01D	Coolant drain plug to radiator	Nm	4

 Engine radiator, coolant hoses and lines

Number	Designation		Engine 460.9 in model 959
BA20.20-N-1001-02Z	Drain screw to engine radiator	Nm	5

 Radiator, coolant hoses

Number	Designation		Engine 457.9
BA20.20-N-1003-01E	Coolant drain plug to radiator	Nm	4

 Engine cooling

Number	Designation			ENGINE 926.9 in MODEL 949.0 with manual transmission	ENGINE 926.9 in MODEL 949.0 with automatic transmission
BF20.00-N-1001-01C	Coolant	Total filling capacity	l	30	36
		Anticorrosion/antifreeze agent down to -37 °C	l	15	18
		Anticorrosion/antifreeze agent down to -45°C	l	16,5	20
		Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Sheet		-	-

 Filling capacities for engine cooling system

Number	Designation			ENGINE 457.9 except CODE BA1	ENGINE 457.9 with CODE BA1
BF20.00-N-1001-01T	Coolant	Total filling capacity	Liter	38	50
		Anticorrosion and antifreeze agent down to –37 °C	Liter	19	25
		Anticorrosion and antifreeze agent down to -45 °C	Liter	21	28
		Specifications for Operating Fluids, Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Specifications for Operating Fluids, Sheet		BB00.40-P-0325-05A	BB00.40-P-0325-05A
		Specifications for Operating Fluids, Sheet		BB00.40-P-0326-05A	BB00.40-P-0326-05A

 Coolant

Number	Designation			Engine 460.9 in model 959
BF20.00-N-1001-01Z	Coolant	Total filling capacity	Liter	38,0
		Anticorrosion and antifreeze agent down to -37 °C	Liter	19,0
		Anticorrosion and antifreeze agent down to -45 °C	Liter	21,0
		Sheet		BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-05A

Referenced documents

ah2000n208001a Notes on coolant
ap2000w201001r Correcting anticorrosion/antifreeze concentration
ar8840w1000r Opening engine hood, moving to upright position and closing
ar8840w1000z Opening engine hood, moving to upright position and closing
as0000z000501a Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.
as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.