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

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ENGINE 159 in MODEL 197

Fig 1: Locating Coolant Expansion Reservoir Cap (Engine 159)

Courtesy of MERCEDES-BENZ USA

	Remove
1	Switch off ignition
2	Open engine hood
	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
3	Unscrew cap (1) for coolant expansion reservoir (2)		AS20.00-Z-0001-01A
	Check
4	Check coolant level
	Notes on coolant		AH20.00-N-2080-01A
	Notes on coolant	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.	AH20.00-N-2080-01A
	Install
5	Seal coolant expansion reservoir (2) with cap (1)
6	Close engine hood