Drain/fill coolant for high-voltage battery cooling system · ar0850s0021f · Mercedes-Benz WIS

AR08.50-S-0021F

Drain/fill coolant for high-voltage battery cooling system

24.07.2020

Engine

780.701 in model 447

Modification notes

20.07.2020	Special tool 124 589 24 21 00 (pressure pump) added.	Operation step 37
20.07.2020	Method modified.	Operation steps 36, 40, 41, 42, 43, 44, 45	AR08.50-S-0017-01F
20.07.2020	Special tool 124 589 24 21 00 (pressure pump) added.	Operation steps 40, 41, 43, 44	AR08.50-S-0017-01F

Drain/fill coolant for high-voltage battery cooling system

1	Cap
2	Coolant expansion reservoir

S20.00-A015-81

S20.00-A016-79

3	Bumper		5	Expansion rivet		6	Screw
4	Trim

S20.00-A017-78

Coolant hose line

Cooler

S20.00-A018-78

9	Coolant hose		11	Coolant hose line		12	Switchover valve
10	Coolant line

S08.50-A013-78

12	Switchover valve		14	Clamp		15	Coolant hose
13	Coolant line

2	Coolant expansion reservoir
16	Tester cap
17	Pressure pump

S08.50-A012-81

 Danger	Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
 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
Topical note	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment		AH00.00-Z-0300-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Topical note	Notes on coolant		AH20.00-N-2080-01A
Topical note	Notes on battery		AH54.10-P-0001-01A
	Notes on coolant level for high-voltage battery cooling system		AH08.50-S-0051-01F
	Drain off
1	Set operating unit of the climate control to position "0."	 The operating unit of the climate control must be deactivated. Otherwise, the coolant pump starts up.
2	Lock electric coolant pumps using vehicle diagnosis system.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-S-2000-04E
		 Work through specified procedure completely. To do so, select following menu items: Powertrain (CPC)  Actuations  Locking of coolant pumps.
		 Do not yet remove vehicle diagnosis system.
3	Remove cap (1) of coolant expansion reservoir (2).	 First, twist open cap (1) of coolant expansion reservoir (2) counterclockwise to the safety catch and release overpressure, then remove cap (1).
4	Raise vehicle.		AR00.60-S-1000E
5	Remove expansion rivets (5).
6	Remove screws (6).
7	Remove trim (4) from the integral carrier and from the bumper (3).	 Pay attention to catch hooks and guides between the bumper (3) and trim (4).
8	Remove coolant hose line (7) from cooler (8) and drain coolant.		AR20.20-P-7441-01RQ
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
9	Lower vehicle.
10	Attach tester cap (16) to coolant expansion reservoir (2).	 Test cap	*210589009100
11	Attach pressure pump (17) to tester cap (16).	 Pressure pump	*124589242100
		 Test cap	*210589009100
12	Use pressure pump (17) to generate pressure until coolant no longer escapes.	 The cooler (8) must be as empty as possible. Otherwise, filling and later ventilation cannot be performed completely, which can lead to malfunctions and damage.
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Pressure pump	*124589242100
13	Raise vehicle.
14	Reattach coolant hose line (7) to cooler (8).		AR20.20-P-7441-01RQ
15	Attach trim (4) to the integral carrier and to the bumper (3).	If no additional work is required in this area.
		 Pay attention to catch hooks and guides between the bumper (3) and trim (4).
16	Tighten screws (6).	If no additional work is required in this area.
17	Install expansion rivets (5).	If no additional work is required in this area.
		 Check expansion rivet (5) for damage.
		If damage is present,
		
		Replace damaged expansion rivets (5).
18	Remove coolant hose line (11) from the switchover valve (12) and drain coolant.		AR20.20-P-7441-01RQ
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
19	Lower vehicle.
20	Use pressure pump (17) to generate pressure until coolant no longer escapes.	 The coolant circuit must be as empty as possible. Otherwise, filling and later ventilation cannot be performed completely, which can lead to malfunctions and damage.
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Pressure pump	*124589242100
21	Raise vehicle.
22	Reattach coolant hose line (11) to the switchover valve (12).		AR20.20-P-7441-01RQ
23	Remove coolant hose (9) from the coolant line (10) and drain coolant.	 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Hose clamp pliers	*454589003700
24	Lower vehicle.
25	Use pressure pump (17) to generate pressure until coolant no longer escapes.	 The coolant circuit must be as empty as possible. Otherwise, filling and later ventilation cannot be performed completely, which can lead to malfunctions and damage.
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Pressure pump	*124589242100
26	Raise vehicle.
27	Reattach coolant hose (9) to coolant line (10).	 Check clamp for damage.
		 Hose clamp pliers	*454589003700
		If damage is present,
		
		Replace clamp.
28	Remove coolant hose (15) from the coolant line (13) and drain coolant.	 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Hose clamp pliers	*454589003700
29	Lower vehicle.
30	Use pressure pump (17) to generate pressure until coolant no longer escapes.	 The coolant circuit must be as empty as possible. Otherwise, filling and later ventilation cannot be performed completely, which can lead to malfunctions and damage.
		 Collect coolant.
		 Commercially available devices/tools Collecting pan
		 Pressure pump	*124589242100
31	Raise vehicle.
32	Reattach coolant hose (15) to coolant line (13).	 Check clamp for damage.
		 Hose clamp pliers	*454589003700
		If damage is present,
		
		Replace clamp.
33	Lower vehicle.
34	Remove pressure pump (17).	 Pressure pump	*124589242100
	Pour in
35	Put the high-voltage on-board electrical system into operation.	If the high-voltage on-board electrical system is not in operation.
			AR47.70-S-1000F
36	Attach charger to 12 volt on-board electrical system battery.		AR54.10-S-1127E
		 The filling and bleeding of the coolant circuit with the diagnostic system takes some time; for this purpose, a constant 12 volt power supply is required.
37	Pour coolant into the coolant circuit of the high-voltage battery.		AR08.50-S-0017-01F
		 The coolant circuit must be as empty as possible before filling. Otherwise, filling and later ventilation cannot be performed completely, which can lead to malfunctions and damage.
		 Evacuate coolant circuit, check, and fill.
		 Electric drive cooling system	*BF08.50-N-1001-01F
		 Test cap	*210589009100
		 Cooler vacuum filling device	*285589002100
		 NTKL Adaption	*285589012100
		 Electric vacuum pump	*285589022100
		 Pressure pump	*124589242100
38	Bleed coolant circuit for high-voltage battery using diagnostic system.
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-S-2000-04E
			AR08.50-S-0017-01F
		 The coolant pumps are released automatically when they are bled. Work through specified procedure completely. To do so, select following menu items: Powertrain (CPC)  Special procedures  Bleeding of passenger compartment high-voltage battery coolant circuit
		 The duration of the bleeding process of the cooling circuit of the high-voltage battery is approx. 30 min.
39	Remove charger from 12 volt on-board electrical system battery.		AR54.10-S-1127E
	Check
40	Check coolant level of the coolant circuit of the high-voltage battery.	If necessary:
		
		Correct coolant level.
		 Electric drive cooling system	*BF08.50-N-1001-01F
41	Check coolant circuit of the high-voltage battery for leak tightness.		AR08.50-S-0011F

 Cooling system

Number	Designation				Engine 780.701/702 in model 447
BF08.50-N-1001-01F	Electric drive cooling system	Cooling system of high-voltage battery and vehicle interior	Filling capacity	Liter	 10
		Cooling system of electric motor	Filling capacity	Liter	 5
		For both cooling systems, entire filling capacity, in the workshop	Filling capacity	Liter	 15
		Antifreeze/water	Down to -37 °C	%	50/50
			Coolant specifications		BB00.40-P-0310-01A
			Sheet		BB00.40-P-0325-05A

285 589 01 21 00

NTKL Adaption

454 589 00 37 00

Hose clamp pliers

210 589 00 91 00

Test cap

124 589 24 21 00

Pressure pump

285 589 02 21 00

Electric vacuum pump

285 589 00 21 00

Cooler vacuum filling device

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