Remove oil from cooling and heating system - AR20.00-P-1250CD

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ENGINE 642, 651 in MODEL 204, 207, 212

ENGINE 651 in MODEL 172

ENGINE 651 in MODEL 218, 221

MODIFICATION NOTES

27.9.13	The heater for the vehicle must be set to the highest temperature stage. The heater circuit will not be flushed otherwise, added.	Operation step 3
27.9.13	Mix the cleaner to a 5% flushing solution (10 l water, 0.5 l cleaner), added.	Operation step 4
1.10.13	If required, repeat operation steps 4 and 10, added.	Operation step 11

Shown on engine 651

Fig 1: Coolant Expansion Reservoir, Radiator And Coolant Thermostat

Courtesy of MERCEDES-BENZ USA

	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
	Risk of injury to skin and eyes suffering scalding from contact with hot coolant spray. 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
	Remove
1	Drain coolant	MODEL 212, 218, 221 with ENGINE 651	AR20.00-P-1142OMA
		MODEL 212 with ENGINE 642	AR20.00-P-1142OGE
		MODEL 172 with ENGINE 651 MODEL 204, 207 with ENGINE 642, 651	AR20.00-P-1142CW
2	Remove coolant thermostat (20) from thermostat housing	Engine 642	AR20.10-P-2460OGE
2	Remove coolant thermostat (20) from thermostat housing	ENGINE 651	AR20.10-P-2460CD
	Clean
3	Set heater control to full output	The heater for the vehicle must be set to the highest temperature stage. The heater circuit will not be flushed otherwise. For vehicles with an auxiliary heater; also set auxiliary heater to full output.
4	Fill cooling and heating system with rinsing solution		AR20.00-P-1142-04A
		Mix the cleaner to a 5% flushing solution (10 l water, 0.5 l cleaner), added.
		Cleaner for engine and cooling system for oil drag-in, 10 l	*BR00.45-Z-1009-04A
		Test cap	Figure
		Cooler vacuum filling device	Figure
5	Warm up engine to operating temperature at medium rotational speed	While engine is running, maintain operating temperature at about 80°C for about 5 min.
6	Switch off engine and allow cooling system to cool down to about 50°C
7	Drain flushing solution completely at drain screw of radiator (18)	Observe environmental protection regulations of cleaner manufacturer.
8	Fill cooling system with fresh water		AR20.00-P-1142-04A
		Test cap	Figure
		Cooler vacuum filling device	Figure
9	Warm up engine to operating temperature at medium rotational speed	While engine is running, maintain operating temperature at about 80°C for about 5 min.
10	Drain fresh water completely at drain screw of radiator (18)	If required, repeat rinsing procedure with fresh water so that all rinsing solution is removed.
11	If required, repeat operation steps 4 and 10.
	Install
12	Replace coolant thermostat (20)	ENGINE 651	AR20.10-P-2460CD
12	Replace coolant thermostat (20)	Engine 642	AR20.10-P-2460OGE
13	Pour in coolant and bleed cooling system	MODEL 172 with ENGINE 651 MODEL 204, 207 with ENGINE 642, 651	AR20.00-P-1142CW
		MODEL 212 with ENGINE 642	AR20.00-P-1142OGE
		MODEL 212, 218, 221 with ENGINE 651 Do not check the pressure of the cooling system until engine has reached its operating temperature. Leaks can occur on the cylinder head gasket otherwise.	AR20.00-P-1142OMA

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

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1009-04A	Cleaner for engine and cooling system for oil drag-in, 10 l	A 002 986 42 71