Drain/fill in coolant - AR20.00-P-1142GZB

ENGINES 642 in MODEL 164, 251 

Fig 1: Filling Coolant To Container

Courtesy of MERCEDES-BENZ USA

	Drain
	Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by 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
	Risk of injury  caused by fingers being pinched or crushed  when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
	Notes on coolant		AH20.00-N-2080-01A
1	Unscrew coolant cap (1) at coolant expansion reservoir (2)	Turn coolant cap (1) counterclockwise one half-turn, release the pressure, then unscrew coolant cap (1).
2	Remove bottom section of soundproofing	Model 164	AR94.30-P-5300GZ
		Model 251	AR94.30-P-5300RT
3	Slide collector siphon hose onto fitting (4) at radiator	The fitting (4) is located at bottom left of the radiator.
4	Open radiator drain plug (3) and drain coolant	Collect coolant in coolant container (01a). Observe regulations for disposal of coolant.
5	Tighten radiator drain plug (3)	To do this, remove siphon hose from fitting (4).
	Filling
6	Pour in coolant and bleed cooling system	Reuse clean coolant.	AR20.00-P-1142-04A
	Coolant specifications	Specification	Coolant (Specification 310.1)
	Anticorrosion/antifreeze agents (Specification)	Specification	Anticorrosion/antifreeze agents (Specification 325.0)
			Fig 3
			Figure
			*BF20.00-P-1001-02W
7	Correct coolant level up to marking in coolant expansion reservoir (2)
	Notes on coolant level		AH20.00-P-1142-01GZB
	Checking
8	Close coolant expansion reservoir (2) with coolant cap (1)
9	Inspecting cooling system for leaks		AR20.00-P-1010GZB

COOLING SYSTEM

Number	Designation			Engine 642 in model 164, 251
BF20.00-P-1001-02W	Cooling system	Quantity changed in workshop	≈ Liters	6.5
		Antifreeze/water	Up to -37°C	50/50
			up to -45°C	55/45
		Service specifications	Specification	Coolant (Specification 310.1)
			Specification	Anticorrosion/antifreeze agents (Specification 325.0)

Fig 2: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Vacuum-Type Cooling System Filler (285 589 00 21 00)

Courtesy of MERCEDES-BENZ USA