Remove/install heater unit · ar8370p5302rt · Mercedes-Benz WIS

AR83.70-P-5302RT

Remove/install heater unit

16.11.2018

Model	164, 166, 251, 292
	with code 228 (Auxiliary heater)

Modification notes

30.03.2016	Release overpressure from cooling system, added.	Step 4
30.03.2016	Close off cap on coolant expansion reservoir, added.	Step 5

P83.70-4994-09

Shown on model 251 with detached front wheel

1	Coolant feed hose	6	Clamp	11	Nuts
2	Coolant return flow hose	7	Bracket	12a	Rubber damper
3	Circuit	8	Electrical connectors	12b	Eyelet
4	Hose clamps	9	Clip	A6	STH heater unit
5	Fuel feed line	10	Exhaust line

 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
 Danger	Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit	Do not operate stationary heater, auxiliary heater or engine with heater booster in closed rooms or when refueling. Allow heater unit to cool down after operation and wear protective gloves.	AS83.70-Z-0002-01A
 Danger	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
Topical note	Notes on coolant		AH20.00-N-2080-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on coolant level	Model 166 with engine 157, 276, 278, 642, 651 with code 228 (Auxiliary heater) Model 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater)	AH20.00-P-1142-01CW
 	Remove/install
1	Connect diagnostic system and store basic data of stationary heater control unit	When replacing stationary heater control unit.
			AD00.00-P-2000-04A
2	Disconnect battery ground line	Model 164, 166, 292 with code 228 (Auxiliary heater)	AR54.10-P-0003GZ
		Model 251 with code 228 (Auxiliary heater)	AR54.10-P-0003RT
3	Carefully open cap on coolant expansion reservoir
4	Release overpressure from cooling system
5	Close off cap on coolant expansion reservoir
6.1	Remove fender liner in left front fender	Model 164 with code 228 (Auxiliary heater)
			AR88.10-P-1300GZ
6.2	Remove fender liner in right front fender	Model 251 with code 228 (Auxiliary heater)
			AR88.10-P-1300RT
6.3	Remove rear section of left front fender liner	Model 166, 292 with code 228 (Auxiliary heater)
			AR88.10-P-1321GQC
7	Pinch off coolant feed hose (1) and coolant return line hoses (2) with clamping devices (3)	 Clamp	*000589403700
8	Detach and pull back hose clamps (4)	 Hose clamp pliers	*003589033700
9	Disconnect coolant feed hose (1) and coolant return hose (2) from stationary heater unit (A6) and close off with a suitable stop plug	 Record plug	*129589009100
10	Collect escaping coolant in a clean vessel
11	Release clamp (6)	 Pliers for click clamps	*171589003700
12	Disconnect fuel feed line (5)
13	Close off fuel feed line (5) and exposed connection	 Record plug	*129589009100
14	Collect escaping fuel in suitable vessel
15	Remove fuel feed line (5) from bracket (7)
16	Release and disconnect electrical connections(8)
17	Loosen clamp (9)
18	Detach exhaust line (10) from stationary heater unit (A6)
19	Unscrew nuts (11)
20.1	Lead rubber damper (12a) out of eyelet (12b)	Model 251 with code 228 (Auxiliary heater)
20.2	Lead rubber damper (12a) out of opening in body	Model 164, 166, 292 with code 228 (Auxiliary heater)
21	Remove STH heater unit (A6)
22	Install in the reverse order
	Bleed cooling system
23	Pour in coolant and bleed cooling system	Model 164 with engine 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 156, 272, 273, 642 with code 228 (Auxiliary heater) Model 166 with engine 651 with code 228 (Auxiliary heater) Model 166, 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater)	AR20.00-P-1142-04A
		Model 164 with engine 113 with code 228 (Auxiliary heater)	AR20.00-P-1142-04AK
		 Re-use clean coolant.
		 Model 166 with engine 651 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02AA
		 Model 164 with engine 642 with code 228 (Auxiliary heater) Model 166, 292 with engine 642 with code 228 (Auxiliary heater) Model 251 with engine 642 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02W
		 Model 166 with engine 278 with code 228 (Auxiliary heater) Model 292 with engine 278 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02EA
		 Model 166 with engine 276 with code 228 (Auxiliary heater) except code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUGIN)) Model 166 with engine 276 with code 228 (Auxiliary heater) with code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUGIN)) Model 251 with engine 276 with code 228 (Auxiliary heater) Model 292 with engine 276 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02BA
		 Model 166 with engine 157 with code 228 (Auxiliary heater) Model 292 with engine 157 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02FA
		 Model 164 with engine 113.964 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02K
		 Model 164, 251 with engine 156 with code 228 (Auxiliary heater) Model 164, 251 with engine 272 with code 228 (Auxiliary heater) Model 164, 251 with engine 273 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02U
		 Model 164 with engine 629 with code 228 (Auxiliary heater)Cooling system	*BF20.00-P-1001-02Y
		 Model 164 with engine 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 156, 272, 273, 642 with code 228 (Auxiliary heater) Model 166 with engine 651 with code 228 (Auxiliary heater) Model 166, 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater) NTKL Adaption	*285589012100
		 Model 164 with engine 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 156, 272, 273, 642 with code 228 (Auxiliary heater) Model 166 with engine 651 with code 228 (Auxiliary heater) Model 166, 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater) Electric vacuum pump	*285589022100
		 Model 164 with engine 113, 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 156, 272, 273, 642 with code 228 (Auxiliary heater) Model 166 with engine 651 with code 228 (Auxiliary heater) Model 166, 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater) Test cap	*210589009100
		 Model 164 with engine 113, 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 156, 272, 273, 642 with code 228 (Auxiliary heater) Model 166 with engine 651 with code 228 (Auxiliary heater) Model 166, 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater) Cooler vacuum filling device	*285589002100
	Check
24	Check cooling system for leak tightness	Model 164, 251 with engine 113 with code 228 (Auxiliary heater)	AR20.00-P-1010GZ
		Model 164, 251 with engine 272, 273 with code 228 (Auxiliary heater) Model 251 with engine 276 with code 228 (Auxiliary heater)	AR20.00-P-1010GZC
		Model 164 with engine 629 with code 228 (Auxiliary heater) Model 164, 251 with engine 642 with code 228 (Auxiliary heater)	AR20.00-P-1010GZB
		Model 164, 251 with engine 156 with code 228 (Auxiliary heater)	AR20.00-P-1010GZS
		Model 166 with engine 157, 276, 278, 642, 651 with code 228 (Auxiliary heater) Model 292 with engine 157, 276, 278, 642 with code 228 (Auxiliary heater)	AR20.00-P-1010GQ
	Initial startup
25	Transfer previously stored basic data to stationary heater control unit	When replacing stationary heater control unit.
			AD00.00-P-2000-04A
26	Perform initial startup of stationary heater control unit	When replacing stationary heater control unit.
			AD00.00-P-2000-04A
		 If the stationary heater unit (A6) switches off automatically before reaching its operating temperature and cannot be restarted again, a fault interlock is present.
		In the case of a fault interlock
		
		Rectify fault interlock using diagnostic system.

 Cooling system

Number	Designation				Engine 651 in model 166
BF20.00-P-1001-02AA	Cooling system	Workshop replacement amount	Main circuit	Liter	10,0
			Low temperature circuit	Liter
		Antifreeze/water	Down to -37°C	%	50/50
			-38°C and below	%	55/45
			Specifications for Operating Fluids, sheet		BB00.40-P-0310-01A
			Specifications for Operating Fluids, sheet		BB00.40-P-0325-00A
			Specifications for Operating Fluids, sheet		BB00.40-P-0326-00A

 Cooling system

Number	Designation				Engine 276 in model 166 except code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUGIN))	Engine 276 in model 166 with code ME05 (HYBRID DRIVE 80KW VARIANT (INCLUDING PLUGIN))
BF20.00-P-1001-02BA	Cooling system	Workshop replacement amount	Main circuit	l	10,5	9,7
			Low-temperature circuit	l	1,9	6,0
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38 °C	%	55/45	55/45
			Specifications for Operating Fluids, sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specifications for Operating Fluids, sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specifications for Operating Fluids, sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

 Cooling system

Number	Designation				Engine 276 in model 251	Engine 276 in model 292
BF20.00-P-1001-02BA	Cooling system	Workshop replacement amount	Main circuit	l	9,5	10,5
			Low-temperature circuit	l	1,9	1,9
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38 °C	%	55/45	55/45
			Specifications for Operating Fluids, sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specifications for Operating Fluids, sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specifications for Operating Fluids, sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

 Cooling system

Number	Designation				Engine 278 in model 166	Engine 278 in model 292
BF20.00-P-1001-02EA	Cooling system	Workshop replacement quantity	Main circuit	Liter	11,4	11,4
			Low temperature circuit	Liter	2,5	2,5
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38 °C	%	55/45	55/45
			Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

 Cooling system

Number	Designation				Engine 157 in model 166	Engine 157 in model 292
BF20.00-P-1001-02FA	Cooling system	Workshop change quantity	Main circuit	Liter	 8	 8
			Low-temperature circuit	Liter	 2	 2
		Antifreeze/water	Up to -37 °C	%	50/50	50/50
			As of -38 °C	%	55/45	55/45
			Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

 Cooling system

Number	Designation			Engine 113.964 in model 164
BF20.00-P-1001-02K	Cooling system	Total filling capacity	Liter	10,00
		Filling capacity of anticorrosion agent/antifreeze down to -37 °C	Liter	5,00
		Filling capacity of anticorrosion agent/antifreeze down to -45 °C	Liter	5,5
		Sheet		BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-00A

 Cooling system

Number	Designation				Engine 156 in model 164, 251	Engine 272 in model 164, 211, 251 Engine 272.964 in model 219
BF20.00-P-1001-02U	Cooling system	Workshop replacement amount	Main circuit	Liter	 7,5	 5,0
			Low temperature circuit	Liter	-	-
		Antifreeze/water	Up to -37_°C		50/50	50/50
			As of -38_°C		55/45	55/45
			Specifications for Operating Fluids, Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Specifications for Operating Fluids, Sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Specifications for Operating Fluids, Sheet		BB00.40-P-0326-00A	-

 Cooling system

Number	Designation				Engine 273 in model 164, 251
BF20.00-P-1001-02U	Cooling system	Workshop replacement amount	Main circuit	Liter	 6,5
			Low temperature circuit	Liter	-
		Antifreeze/water	Up to -37_°C		50/50
			As of -38_°C		55/45
			Specifications for Operating Fluids, Sheet		BB00.40-P-0310-01A
			Specifications for Operating Fluids, Sheet		BB00.40-P-0325-00A
			Specifications for Operating Fluids, Sheet		-

 Cooling system

Number	Designation				Engine 642 in model 164	Engine 642 in model 166
BF20.00-P-1001-02W	Cooling system	Workshop replacement amount	Main circuit	l	6,5	11,5
			Low-temperature circuit	l	-	-
		Antifreeze/water	Down to -37°C	%	50/50	50/50
			-38°C and below	%	55/45	55/45
			Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Sheet		BB00.40-P-0325-00A	BB00.40-P-0325-00A
			Sheet		BB00.40-P-0326-00A	BB00.40-P-0326-00A

 Cooling system

Number	Designation				Engine 642 in model 251	Engine 642 in model 292
BF20.00-P-1001-02W	Cooling system	Workshop replacement amount	Main circuit	l	9,5	11,5
			Low-temperature circuit	l	-	-
		Antifreeze/water	Down to -37°C	%	50/50	50/50
			-38°C and below	%	55/45	55/45
			Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Sheet		BB00.40-P-0325-00A	BB00.40-P-0325-06A
			Sheet		BB00.40-P-0326-00A	BB00.40-P-0326-06A

 Cooling system

Number	Designation			Engine 629 in model 164
BF20.00-P-1001-02Y	Cooling system	Total filling capacity	Liter	10,5
		Antifreeze/water	bis -37°C	50/50
		Antifreeze/water	bis -45°C	55/45
		Sheet		BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-00A

285 589 01 21 00

NTKL Adaption

210 589 00 91 00

Test cap

003 589 03 37 00

Hose clamp pliers

129 589 00 91 00

Record plug

000 589 40 37 00

Clamp

171 589 00 37 00

Pliers for click clamps

285 589 02 21 00

Electric vacuum pump

285 589 00 21 00

Cooler vacuum filling device

Referenced documents

ad0000p200004a Connect STAR DIAGNOSIS and read out fault memory
ad0000p200004a
ah2000n208001a Notes on coolant
ah2000p114201cw Notes on coolant level
ah5400p000101a Information on preventing damage to electronic components due to electrostatic discharge
ar2000p1010gq Inspect cooling system for leaks
ar2000p1010gz Inspect cooling system for leaks
ar2000p1010gzb Inspect cooling system for leaks
ar2000p1010gzc Inspecting cooling system for leaks
ar2000p1010gzs Inspect cooling system for leaks
ar2000p114204a Pour in coolant and bleed cooling system
ar2000p114204ak
ar2000p114204ak Pour in coolant and bleed cooling system
ar5410p0003gz Disconnect/connect battery ground line
ar5410p0003rt Disconnect/connect battery ground line
ar8810p1300gz Remove/install fender liner in front fender
ar8810p1300rt Remove/install fender liner in front fender
ar8810p1321gqc Remove/install rear section of front fender liner
as0000z001001a Risk of death caused by vehicle slipping or toppling off of the lifting platform.
as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.
as8370z000201a Risk of explosion caused by fuel vapors igniting, risk of poisoning caused by inhaling combustible gases and risk of injury caused by burns during and after operation of heater unit