Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration · ap2000g2010c · Mercedes-Benz WIS

AP20.00-G-2010C

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

23.03.2018

Engine

900.920/921, 904.952/953, 924.916/923/931, 926.969

Modification notes

23.03.2018

Document completely revised.

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

G20.30-3145-01

G20.30-3144-01

G20.20-3222-01

Shown on model 437.421

1	Expansion reservoir
2	Cap
A	Fold

Shown on model 437.465

1	Expansion reservoir
2	Cap
A	Fold

Shown on model 437.421

3	Drain screw

Shown on model 437.467

1	Expansion reservoir
2	Cap
4	Cap
5	Valve part
A	Fold

G20.30-3146-11

 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 437.42/43	AR88.40-G-1000C
		 Model 437.46 See information from body manufacturer.
2	Unscrew cap (2) from expansion reservoir (1).
3.1	Check specified composition of anticorrosion and antifreeze in coolant.	Model 437.42/43/465
		 Coolant	*BF20.00-N-1001-01I
		If problems exist,
		
		Remove drain screw (3), drain off a little coolant and tighten drain screw (3). Correct mixing ratio of anticorrosion and antifreeze.
			AP20.00-G-2010-01B
		 After obtaining special order.
		 Drain screw to engine radiator	*BA20.20-N-1001-01K
3.2	Check specified composition of anticorrosion and antifreeze in coolant.	Model 437.467
		 Coolant	*BF20.00-N-1001-01I
		If problems exist,
		
		Open cover (4), screw "Series 40" connector onto valve part (5) and drain off a little coolant, then close cover (4) again. Correct mixing ratio of anticorrosion and antifreeze.
			AP20.00-G-2010-01B
		 After obtaining special order.
		 The "Series 40" connector can be ordered from the Skarke company: http://www.skarke.de
4	Check coolant level.	 Check and correct coolant level at a coolant temperature of less than 50 °C only. The engine cooling system is correctly filled when the coolant is level with the fold (A), or the Max. marking on the expansion reservoir (1).
5	Correct coolant level.	If required.
		 Pour in coolant up to the fold (A) or up to the Max. marking on the expansion reservoir (1). Use coolant of the specified composition only.
		 Coolant	*BF20.00-N-1001-01I
6	Start engine and let it warm-up.
7	Check coolant level, top up if necessary.
8	Switch off engine.
9	Screw down cap (2).
10	Close hood.
		Model 437.42/43	AR88.40-G-1000C
		 Model 437.46 See information from body manufacturer.

 Radiator, coolant hoses

Number	Designation		Engine 900.920/921, 904.952/953, 924.916/923/931
BA20.20-N-1001-01K	Drain screw to engine radiator	Nm	25

 Engine cooling

Number	Designation			Engine 900.920/921	Engine 904.952/953
BF20.00-N-1001-01I	Coolant	Total filling capacity	l	26	26
		Anticorrosion and antifreeze agent down to –37 °C	l	13	13
		Anticorrosion and antifreeze agent down to –45 °C	l	14,3	14,3
		Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-05A	BB00.40-P-0325-05A

 Engine cooling

Number	Designation			Engine 924.916	Engine 924.923/931
BF20.00-N-1001-01I	Coolant	Total filling capacity	l	26	26
		Anticorrosion and antifreeze agent down to –37 °C	l	13	13
		Anticorrosion and antifreeze agent down to –45 °C	l	14,3	14,3
		Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-05A	BB00.40-P-0325-05A

 Engine cooling

Number	Designation			ENGINE 926.969 except CODE F43 except CODE GC8	ENGINE 926.969 with CODE F43 with CODE GC8
BF20.00-N-1001-01I	Coolant	Total filling capacity	l	30	46
		Anticorrosion and antifreeze agent down to –37 °C	l	15	23
		Anticorrosion and antifreeze agent down to –45 °C	l	16,5	25,5
		Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-05A	BB00.40-P-0325-05A

Referenced documents

ah2000n208001a Notes on coolant
ap2000g201001b Correcting anticorrosion/antifreeze concentration
ar8840g1000c 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.