Mercedes-Benz ML320. Service manual - part 692

 

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Mercedes-Benz ML320. Service manual - part 692

 

 

If the victim's breathing is shallow, or the individual has stopped breathing altogether, tilt the head back 
and administer artificial resuscitation. Call a doctor.  

In case of ingestion 

Consult a physician immediately.  

SAFETY INFORMATION: CLIMATE CONTROL - AS83.00-Z-9999ZZ 

MODEL all  

TROUBLE DIAGNOSIS  

AIR CONDITIONING SOMETIMES DOES NOT WORK - AF83.30-P-6000B 

MODEL 124, 126, 129, 140, 163, 168, 170, 201, 202, 208, 210  

Modification notes 

 

Risk of explosion. Explosions may result when performing 
welding or soldering work on a closed air conditioning system. 
Risk of poisoning. Poisoning may result from inhaling 
overheated refrigerant vapors. Risk of injury. Contact with 
liquid refrigerant may result in injury to the skin and eyes.

MODEL 240

AS83.00-P-
0001-01H

 

Risk of death caused by contact with current conducting parts 
when repairing parts of the external power supply

MODEL 639, 903 ...

AS83.00-
Z-0002-
01A

 

Risk of explosion caused by welding or soldering work on 
closed air conditioning system. Risk of poisoning caused by 
inhaling overheated refrigerant vapors. Risk of injury to skin 
and eyes caused by contact with liquid refrigerant.

MODEL all

AS83.00-
Z-0001-
01A

 Hazard from contact with parts conducting high voltages.

MODEL all with CODE 
(H25) Eberspacher D 30 
W with CODE (H26) 
Webasto DW 300

AS83.70-
Z-0001-
01A

 

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

MODEL all with heater, 
additional heating or 
stationary heating

AS83.70-
Z-0002-
01A

 

Risk of explosion from liquefied petroleum gas flowing out 
and from fuel vapors. Risk of poisoning from inhaling 
combustion gases.

BODY 940, 972 ...

AS83.70-
Z-0004-
01A

 Risk of poisoning due to inhalation of heater exhaust gases

MODELS 901, 902, 903, 
904, 905 for underfloor 
heaters

AS83.70-
Z-0005-
01A

1.9.99

Supersedes STIP 83.30-007 dated 15.8.97

   

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Parts ordering notes 

INSUFFICIENT AIR CONDITIONING DURING IDLING - AF83.30-P-6007A 

MODEL 163.154 #A up to 289564, 163.154 #X, 163.136 /172 with CODE (580) Air conditioning or 
Tempmatic for USA
  

Modification notes 

Operation no. of operation texts or standard texts and flat rates 

Damage 
code

Cause

Remedy

 

83 751

Pressure sensor (B12) occasionally indicates wrong 
pressure value to control and operating module 
(N19/22) (depending on temperature).

1 Connect pressure gauge and HHT.

 

 

 Air conditioning/automatic air conditioning 

occasionally does not function, refrigerant 
compressor does not run.

2 Call up air conditioning actual values 
with HHT.

 

 

 

3 Compare refrigerant pressure 
between pressure gauge (high pressure 
side) and HHT.

 

 

 

 If pressure difference is greater than 

2 bars.? 
4 Remove/install/replace pressure 
sensor on receiver/drier.

 

Part no.

Designation

Quantity

140 830 00 72

Pressure sensor

As required

21.6.04

Work steps 1-2 erased

 

 

Category

Op. 
no.

Operation text

Time

Acc. 
no.

Code

P

023731

Install modified wiring harness for auxiliary fan (after 
checking)

015 
WU

-

-

Damage 
code

Cause

Remedy

 

50 041 73

Fuse f44 blows due to 
repeated switch-on of 
additional fan

1 Check whether service auxiliary wiring harness (2) 
for additional fan has already been installed 

 The original additional fan connector (M4x1) is 

already fastened next to the new additional fan 
connector (3) with adhesive tape.

 

 

 

 If auxiliary wiring harness (2) is already 

installed: ? 
2 Ensure that a 40 A fuse is located at position f44 

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Fig. 130: Identifying Fuse And Relay Module, Additional Fan Connector And Plug Connector, Blue 

NO REFRIGERATION/HEAT FROM AUTOMATIC AIR CONDITIONER - AF83.40-P-3400A 

MODEL 163.### #A as of 289565 up to 458809, 163.### #X as of 754620 up to 777100  

Operation no. of operation texts or standard texts and flat rates 

 

 

 If an auxiliary wiring harness (2) has not yet been 

installed: ?

 

 

 

3 Install auxiliary wiring harness.

SM83.30-P-
0009GH

 

 

 If an additional wiring harness and a 40 A fuse are 

already installed and the auxiliary fan does not 
function: ? 
4 Perform corresponding diagnosis and repair.

 

Category

Op. no.

Operation text

Time

Acc. no.

Code

P

831917

Replace air conditioning operating unit

014 WU

-

-

Damage 
code

Cause

Remedy

 

83 491 90

The air mixing flap is not actuated by the AAC [KLA] 
control and operating unit (N22) because the voltage in 
the vehicle electrical system is too low during cold start.

1 Replace AAC [KLA] 
control and operating  AR83.40-P-

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

Parts ordering notes 

HEATER DOES NOT FUNCTION - AF83.40-P-6008A 

MODEL 163.154 /174 /175 #A as of 289565 up to 348398 with CODE (494) USA version with CODE (580) 
Automatic air conditioning
  

MODEL 163.113 /154 /174 /175 #A as of 289565 up to 348412, 163.113 /128 #X as of 754620 up to 772006 
except CODE (494) USA version with CODE (580) Automatic air conditioning
  

Modification notes 

Operation no. of operation texts or standard texts and flat rates 

 This fault occurs only on AAC [KLA] control and 

operating units (N22) with part number A163 820 25 89, 
A163 820 28 89, A163 820 42 89
 and A163 820 43 89 

unit (N22)

6500GH

Part no.

Designation

Quantity

163 820 49 89

ECE AAC [KLA] control and operating unit

1

163 820 50 89

USA AAC [KLA] control and operating unit

1

12.5.04

Information revised in step 11; WE table added; part number revised

   

Category

Op. no.

Operation text

P

023610

Perform diagnosis on left air mixing flap actuator motor (M2/6)

Damage 
code

Cause

Remedy

 

83 491 
90

The automatic air 
conditioning control unit 
(N22) does not communicate 
with the blending air flap 
actuator motor (M2/6).

1 Connect STAR DIAGNOSIS and perform short 
test.

AD00.00-P-
2000-04A
  
*WH58.30-
Z-1048-13A

 

 

 If fault codes are present: ? 

2 Perform diagnosis and repair according to fault 
code description.

 

 

 

 If NO fault codes are present: ? 
 Perform following test when engine is cold.

 

 

 

3 Select "Actual values" with STAR DIAGNOSIS 
under "Automatic air conditioning".

 

 

 

4 Select "M2/6 (blending air flap actuator motor)".  

 

 

5 Set temperature control to maximum cooling and 
wait 30 seconds Observe the actual value of the 
blending air flap actuator motor (M2/6) and switch 
over the temperature control switch to maximum 
heating.

 

 

2001 Mercedes-Benz ML320 

1998-2005 HVAC Climate Control - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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