Check main circuit coolant level - AP20.30-P-2050G

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ENGINE 157, 279 in MODEL 463

ENGINE 273 in MODEL 463.202/222/236/237 as of model year 2012

ENGINE 642 in MODEL 463.346 as of model year 2012

Shown on ENGINE 642

Fig 1: Locating Coolant Expansion Reservoir Cap (Engine 642)

Courtesy of MERCEDES-BENZ USA

	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
	Notes on coolant		AH20.00-N-2080-01A
	Remove
1	Switch off ignition
2	Open engine hood and raise to vertical position
	Open engine hood and raise to vertical position		AR88.40-P-1000GG
3	Unscrew cap (1) for coolant expansion reservoir (2)
	Check
4	Check coolant level	The coolant level on a cold engine must reach up to the marking (arrow) in the coolant expansion reservoir. When the coolant is warm, about 1 cm above the marking (arrow). If coolant level is too low: ↓ Check coolant for leaktightness and check coolant for antifreeze content subject to separate repair order.
	Install
5	Seal coolant expansion reservoir (2) with cap (1)
6	Close engine hood
	Close engine hood		AR88.40-P-1000GG