Drain/pour in coolant

AR20.00-P-1142GZC

11.12.2018

Engine	272, 273 in model 164
Engine	272, 273, 276 in model 251

Shown on model 251 with engine 272

1	Coolant expansion reservoir
2	Cap
3	Right cylinder crankcase drain screw
4	Left cylinder crankcase drain screw
5	Drain screw for radiator
6	Fitting

P20.00-2290-06

Engine 276

7	Coolant pump drain screw
8	Coolant pump
9	Drain hose

P20.00-2434-11

	Drain off
 Danger	Risk of explosion from explosive gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury through burns to skin and eyes from battery acid or when handling damaged lead-acid batteries	No fires, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
 Warning	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
1	Unscrew cap from the coolant expansion reservoir (1)	 Unscrew cap slowly and relieve overpressure.
2	Remove lower engine compartment paneling	Model 164	AR61.20-P-1105GZ
		Model 251	AR61.20-P-1105RT
	Drain coolant at radiator
3	Push drain hose onto fitting (6) on cooler	 The fitting (6) is located at bottom left of the cooler.
4	Loosen cooler drain screw (5) and drain coolant	 Observe regulations for disposal of coolant.
	Drain coolant from cylinder crankcase and coolant pump
5	Detach ground line from battery	Engine 272, 273 When draining coolant at right cylinder crankcase drain screw (3).
Topical note	Notes on battery		AH54.10-P-0001-01A
		Model 164	AR54.10-P-0003GZ
		Model 251	AR54.10-P-0003RT
6.1	Loosen right and left drain screw (3 and 4) from the cylinder crankcase until they can be turned by hand	Engine 272, 273
6.2	Loosen drain screw (7) from coolant pump (8) until it can be turned by hand	Engine 276
7.1	Push drain hose onto right and left drain screw (3 and 4) on the cylinder crankcase	Engine 272, 273
7.2	Push drain hose (9) onto drain screw (7)	Engine 276
8	Continue to loosen drain screw (3 and 4 or 7) on the cylinder crankcase and coolant pump by hand and drain coolant	 Observe regulations to dispose of coolant.
	Pour in
9	Tighten cooler drain screw (5) and detach drain hose from fitting (6)
10.1	Detach drain hose and tighten drain screw (3 and 4) on cylinder crankcase	Engine 272, 273
		 Coolant drain plug to cylinder crankcase	*BA20.00-P-1001-02E
10.2	Detach drain hose and tighten drain screw (7) on coolant pump (8)	Engine 276
		 Drain screw on coolant pump	*BA20.10-P-1008-01AA
11	Pour in coolant and bleed cooling system		AR20.00-P-1142-04A
Topical note	Notes on coolant		AH20.00-N-2080-01A
	Notes on coolant level		AH20.00-P-1142-01CW
	Coolant specifications		BB00.40-P-0310-01A
	Anticorrosion/antifreeze agents (Sheet 325.0)		BB00.40-P-0325-00A
		 Re-use clean coolant.
		 Coolant mixing ratio	*BF20.00-P-1001-04A
		 Test cap	*210589009100
		 Cooler vacuum filling device	*285589002100
12	Check cooling system for leaktightness		AR20.00-P-1010GZC
13	Mount ground line on battery	After tightening the right cylinder crankcase drain screw (3)
		Model 164	AR54.10-P-0003GZ
		Model 251	AR54.10-P-0003RT
14	Connect STAR DIAGNOSIS and read out fault memory	After detaching ground line on battery
		 Stored faults entries which may have been caused by disconnecting lines or by a simulation must be erased in the fault memory after completing the work.
15	Install lower engine compartment paneling	Model 164	AR61.20-P-1105GZ
		Model 251	AR61.20-P-1105RT
16	Screw cap onto the coolant expansion reservoir (1)

 Engine cooling, general

Number	Designation		Engine 272	Engine 273
BA20.00-P-1001-02E	Coolant drain plug to cylinder crankcase	Nm	12	12

 Coolant pump, coolant thermostat

Number	Designation			Engine 276
BA20.10-P-1008-01AA	Drain screw on coolant pump	Stage 1	Nm	6
		Stage 2	°	90

 Coolant mixing ratio

Number	Designation				Engine all (4xWD, CAR, smart)
BF20.00-P-1001-04A	Coolant mixing ratio	Antifreeze/water	Up to -37°C	%	50/50
			As of -38 °C	%	55/45
			Overview and specifications sheet		BB00.40-P-0310-01A
			References to sheet specification		BB00.40-P-0310ZZ

210 589 00 91 00

Test cap

285 589 00 21 00

Cooler vacuum filling device

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