Pour In Coolant And Bleed Cooling System - AR20.00-S-1142-04E

Model 447 with engine 274, 622.9, 651

Model 448 with engine 274

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 overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
Notes on coolant level		AH20.00-P-1142-01CW
	Clip: Pour in coolant and bleed engine cooling system	multimedia:A supplement to the article is available.

MODIFICATION NOTES

25.09.2022	Coolant	Engine 622.951 except code H12 (Auxiliary water heater)	BF20.00-Z-1001-01KOA
25.09.2022	Coolant	Engine 622.951 with code H12 (Auxiliary water heater)	BF20.00-Z-1001-01KOA
25.09.2022	Coolant	Engine 651.950 except code H12 (Auxiliary water heater)	BF20.00-Z-1001-01KOA
25.09.2022	Coolant	Engine 651.950 with code H12 (Auxiliary water heater)	BF20.00-Z-1001-01KOA
25.09.2022	Coolant		BF20.00-Z-1001-01KOK

ENGINE COOLING

Number	Designation			Engine 622.951 except code H12 (Auxiliary hot-water heater)	Engine 622.951 with code H12 (Auxiliary hot-water heater)
BF20.00-Z-1001-01KOA	Coolant	Total filling capacity	Liter	≈10, 7	≈13, 7
		Anti-corrosion agent/antifreeze down to -37°C	Liter	≈5, 4	≈6, 9
		Corrosion/antifreeze down to -45°C	Liter	≈5, 9	≈7, 5
		Specification		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Specification		BB00.40-P-0325-06A	BB00.40-P-0325-06A
		Specification		BB00.40-P-0326-06A	BB00.40-P-0326-06A
		Specification		-	-

ENGINE COOLING

Number	Designation			Engine 651.950 except code H12 (Auxiliary hot-water heater)	Engine 651.950 with code H12 (Auxiliary hot-water heater)
BF20.00-Z-1001-01KOA	Coolant	Total filling capacity	Liter	≈10, 4	≈13, 4
		Anti-corrosion agent/antifreeze down to -37°C	Liter	≈5, 2	≈6, 7
		Corrosion/antifreeze down to -45°C	Liter	≈5, 7	≈7, 4
		Specification		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Specification		BB00.40-P-0325-06A	BB00.40-P-0325-06A
		Specification		BB00.40-P-0326-06A	BB00.40-P-0326-06A
		Specification		-	-

ENGINE COOLING

Number	Designation			Engine 274 in model 447, 448
BF20.00-Z-1001-01KOK	Coolant	Total filling capacity	Liter	≈10, 4
		Anti-corrosion agent/antifreeze down to -37°C	Liter	≈5, 2
		Corrosion/antifreeze down to -45°C	Liter	≈5, 7
		Specification		BB00.40-P-0310-01A
		Specification		BB00.40-P-0325-06A
		Specification		BB00.40-P-0326-06A

Fig 1: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Cooler Vacuum Filling Device (285 589 00 21 00)

Courtesy of MERCEDES-BENZ USA

Attach tester cap (1) to the expansion reservoir.
Attach control unit (2) to tester cap (1).
Attach Venturi nozzle (3) to control unit (2).
Close feed valve (4) and drain valve (5).

Courtesy of MERCEDES-BENZ USA
Attach feed hose (6) to coolant reservoir (7).
Model 447, model 448 with engine 274

MODEL 447 with ENGINE 622, 651

To prevent air from being drawn in, ensure that the coolant reservoir (7) contains more coolant than the maximum filling capacity of the engine cooling system.
Connect waste air hose (8) in an empty, suitable container.
Attach compressed-air hose (9) to Venturi nozzle (3) and apply compressed air.
Open drain valve (5).
Open feed valve (4) for a short time until the feed hose (6) has filled with coolant.
A vacuum is created in the engine cooling system.
Close drain valve (5) if display of the control unit (2) is in the green area.
Remove compressed-air hose (9) from Venturi nozzle (3) and observe whether vacuum remains stable for 30 s.
If vacuum does not remain stable for 30 s:

↓

Check hoses and connections, repair affected components and repeat test.
Open feed valve (4).
The engine cooling system is now filled.
Open drain valve (5) as soon as coolant is no longer suctioned.
The remaining existing vacuum will be removed in this way.
Remove control unit (2) along with all the connections and tester cap (1).
Correct coolant level on expansion reservoir.
The coolant level must not exceed the MAX marking.