Drain/pour in coolant - AR20.00-P-1142RK

ENGINE 157, 276, 278 in MODEL 231 

Fig 1: Cap, Drain Hose, Fitting, Coolant Expansion Reservoir, Radiator And Drain Screw

Courtesy of MERCEDES-BENZ USA

Engine 276 

Fig 2: Coolant Pump, Drain Hose And Drain Screw - Shown On Engine 276

Courtesy of MERCEDES-BENZ USA

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury  to skin and eyes suffering scalding from contact with hot contemporary. 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
	Notes on coolant level		AH20.00-P-1142-01V
	Drain off
1	Unscrew cap (2) from coolant expansion reservoir (4)	Turn cap (2) slowly and release overpressure, then unscrew cap (2).
2	Remove lower engine compartment paneling		AR61.20-P-1105RK
3	Push drain hose (3) onto left fitting (3a) on radiator (6)
4	Open drain screw (7) at radiator (6) and drain coolant	Observe regulations to dispose of coolant.
5	Empty low-temperature water circuit	Engine 157, 278 in model 231 To do this switch on ignition for 5 seconds. Repeat this procedure twice after a waiting time of about 30 s in order to empty the low- temperature water circuit.
6	Loosen drain screw on coolant pump (5)	Engine 276 in model 231 Drain screw on coolant pump	*BA20.10-P-1008-01AA
7	Push drain hose (3) onto drain screw on coolant pump (5)	Engine 276 in model 231
8	Open drain screw on coolant pump (5) and drain coolant	Engine 276 in model 231
	Pour in
9	Tighten drain screw (7) on cooler (6) and detach drain hose (3) from fitting (3a)
10	Tighten drain screw at coolant pump (5) and detach drain hose (3) from fitting	Engine 276 in model 231
11	Pour in coolant and bleed cooling system	Re-use clean coolant.	AR20.00-P-1142-04A
		Coolant mixing ratio	*BF20.00-P-1001-04A
		Cooler vacuum filling device	Fig 3
		Test cap	Figure
12	Bleed low-temperature water circuit	To do this switch on ignition for 5 seconds. Repeat this procedure twice after a waiting time of about 30 s in order to fill the low-temperature water circuit and to bleed it.
13	Check cooling system for leaktightness		AR20.00-P-1010RK
	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
14	Perform an engine test run and check cooling system for proper operation

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