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

ENGINE 272, 273 in MODEL 221 

ENGINE 273 in MODEL 216 

Fig 1: Locating Coolant Drain Hose

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 death  caused by vehicle slipping or toppling off the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on coolant		AH20.00-N-2080-01A
1	Unscrew cooling system cap at coolant expansion reservoir	Turn cooling system cap slowly and release excess pressure, then unscrew cooling system cap.
	Drain coolant from radiator
2	Slide drain hose on to left fitting (3) at radiator
3	Open radiator drain plug (4) and drain coolant	Follow regulations for disposal of coolant.
4	Turn key for about 5 s in ignition lock in position 1 and then turn key again into position 0	Model 221.095/195 Repeat process twice after a waiting time of about 30 seconds in order to empty the low-temperature water circuit.
	Drain coolant at crankcase
5	Detach ground line(s) from battery/batteries	Except model 221.095/195 Vehicles with 4MATIC: Before draining the coolant at the left drain screw (5). Vehicles without 4MATIC: Before draining the coolant at the right drain screw (6).	AR54.10-P-0003SX
6	Remove power electronics from cylinder crankcase	Model 221.095/195: Before draining the coolant at the right drain screw (6).	AR08.10-P-0011SXH
7	Loosen the left or right drain plug (5, 6) at the crankcase until it can be turned manually
8	Push drain hose (3) onto left (5) or right (6) drain screw
9	Continue to manually loosen left or right drain plug (5, 6) and drain coolant	Follow regulations for disposal of coolant.
	Filling
10.1	Tighten drain plug (4) at radiator and detach siphon hose from fitting (3)	After coolant is drained at radiator
10.2	Detach drain hose (3) and tighten crankcase drain plug at left and right (5, 6)	After draining the coolant at the crankcase
			*BA20.00-P-1001-02E
11	Mount power electronics on cylinder crankcase	Model 221.095/195: After draining the coolant at the right drain screw (6).	AR08.10-P-0011SXH
12	Attach ground line(s) for battery (batteries)	Except model 221.095/195 Vehicles with 4MATIC: after draining the coolant at LH drain screw (5). Vehicles without 4MATIC: after draining the coolant at RH drain screw (6).	AR54.10-P-0003SX
13.1	Pour in coolant and bleed cooling system	Except model 221.095/195 Reuse clean coolant.	AR20.00-P-1142-04A
	Coolant specifications	Sheet 310.1	Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1
	Anticorrosion/antifreeze agents (Sheet 325.0)	Sheet 325.0	Anticorrosion/antifreeze agents (Specification 325.0). See https://bevo.mercedes-benz.com/index.php?language_id=1
			*BF20.00-P-1001-02U
			Figure
			Figure
	Notes on coolant level		AH20.00-P-1142-01V
13.2	Add coolant, bleed cooling system and turn key for about 5 s in ignition lock in position 1 and then turn key again into position 0	Model 221.095/195 Repeat process twice after a waiting time of about 30 seconds in order to charge and purge the low-temperature water circuit.	AR20.00-P-1142-04A
14	Inspect cooling system for leaks		AR20.00-P-1010SX
15	Connect STAR DIAGNOSIS, read out fault memory and erase if necessary	Except model 221.095/195: After detaching the ground line(s) for battery (batteries).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A

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