Page 1729 of 4133

LOUDSPEAKER SYSTEM (LS) DIAGNOSIS, FUNCTION CHECK - AD82.62-P-3001A 
MODEL all with MB radio  
SPEAKER SYSTEM (LSA) DIAGNOSIS TROUBLESHOOTING - AD82.62-P-5001D 
MODEL 163 with CODE (491) U.S. version with CODE (257) Radio Hi-Line  
MODEL 163 with CODE (257a) Radio ML 5 except CODE (491) U.S. version  
SPEAKER SYSTEM (LSA) DIAGNOSIS TROUBLESHOOTING - AD82.62-P-5001E 
1AM and FM wavebands 
diagnosis, AS function 
check AD82.62-P-3000-01A
 Set station with good 
reception (music) or play 
music cassette or CD  
Fader, bass, treble and balance 
in position 0 (shown in 
display).  
  
 Function check   
Scope of test Operation/Requirement Specified value Possible 
cause/Remedy 
1 Loudspeaker Listen to each loudspeaker 
individually in the respective 
installed position.  
 Loudspeaker system (LS), 
diagnosis, advanced 
information AD82.62-P-2001B
 Loudspeaker system (LS), 
location of components GF82.62-P-0002-01D
 Troubleshooting   
Complaint Cause Note Remedy 
Left front door speaker 
(H4/5) inoperativeLoudspeaker (H4/5) 
Radio (A2) AD82.62-P-6001-02M
Left rear door speaker 
(H4/3) inoperativeLoudspeaker (H4/3) 
Radio (A2) AD82.62-P-6001-02O
Right front door speaker 
(H4/6) inoperativeLoudspeaker (H4/6) 
Radio (A2) AD82.62-P-6001-02P
Right rear door speaker 
(H4/4) inoperativeLoudspeaker (H4/4) 
Radio (A2) AD82.62-P-6001-02R
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 234 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1730 of 4133

MODEL 163 with CODE (491) U.S. version with CODE (259) Radio Premium with Bose sound system
MODEL 163 with CODE (259a) Radio ML 10 with sound system except CODE (491) U.S. version  
RADIO FREQUENCY CONNECTING LINE, ANTENNA SYSTEM (AS) ELECTRICAL SYSTEM TEST - AD82.62-P-6000-02A
 Loudspeaker system (LS) 
diagnosis, previous 
knowledge AD82.62-P-2001A
 LS, location of components GF82.62-P-0002-01E
 Troubleshooting   
Complaint Cause Note Remedy 
Loudspeaker system 
inoperativeAmplifier control module 
(N40/6) 
Radio (A2) AD82.62-P-6001-01C
Left rear door speaker 
(H4/3) inoperativeLeft rear door speaker 
(H4/3) AD82.62-P-6001-02S
 Amplifier control module 
(N40/6) AD82.62-P-6001-01C
 Radio (A2)  
Right rear door speaker 
(H4/4) inoperativeLoudspeaker group (H4/4) AD82.62-P-6001-02T
 Amplifier control module 
(N40/6) AD82.62-P-6001-01C
 Radio (A2)  
Left front door speaker 
(H4/5) inoperativeLoudspeaker group (H4/5) AD82.62-P-6001-02U
 Amplifier control module 
(N40/6) AD82.62-P-6001-01C
 Radio (A2)  
Right front door speaker 
(H4/6) inoperativeLoudspeaker (H4/6) AD82.62-P-6001-02V
 Amplifier control module 
(N40/6) AD82.62-P-6001-01C
 Radio (A2)  
Acoustimass (R) bass 
module (H4/17) 
inoperativeLoudspeaker (H4/17) AD82.62-P-6001-04A
 Amplifier control module 
(N40/6) AD82.62-P-6001-01C
 Radio (A2)  
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 235 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1731 of 4133
Fig. 136: Radio Frequency Connecting Line, An tenna System (AS) Electrical System Test 
VOLTAGE SUPPLY, ANTENNA SYSTEM (AS) ELECTRICAL  SYSTEM TEST - AD82.62-P-6000-03A 
Fig. 137: Voltage Supply, Antenna Syst em (AS) Electrical System Test 
FM/AM AMPLIFIER POWER CONSUMPTION, ANTENNA SY STEM (AS) ELECTRICAL SYSTEM TEST - AD82.62-P-6000- 
04A 
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electr  ical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 236 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1732 of 4133

Fig. 138: FM/AM Amplifier Power Consumption, Antenna System (AS) Electrical System Test 
FM/AM AMPLIFIER GROUND CONNECTION, ANTENNA SYSTEM (AS) ELECTRICAL SYSTEM TEST - AD82.62-P-6000-
05A 
ANTENNA SYSTEMS (AS), TESTING ELECTRICAL SYSTEM - AD82.62-P-6000A 
MODELS 163, 168, 202.078 /080 /083 /182 /188, 208 (except, 208.4), 202.01 /02/12 as of 1.1.97, 210.0 /2  
 Test ofGauge/test connectionOperation/ 
RequirementSpecified 
valuePossible 
cause/ 
Remedy  
1.0 Ground 
connection  
FM/AM 
amplifier 
(A2/18)  A2/18Radio (A2): OFF 
 Do not release 
attachment at 
FM/AM amplifier 
(A2/18). The 
attachment point 
of the amplifier 
simultaneously 
serves as the 
ground 
connection.< 1 ohmsTransition 
impedance at 
ground 
connection  
 Antenna system (AS) 
diagnosis, previous 
knowledge AD82.62-P-2000A
 Battery voltage 
11-14V>    
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 237 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1733 of 4133

AMPLIFIER CONTROL MODULE TEST ELECTRICS LSA - AD82.62-P-6001-01C 
Model 163 with sound system  
Fuses OK  
Radio in order  
No damage to 
the rear 
window and/or 
to the rear or 
side window  
Test step Inspecting   
1Rear window 
suppressor capacitor 
antenna system (AS) 
electrical system testexcept MODELS 163, 210.2AD82.62-P-6000-
01A
2Radio frequency 
connecting line, 
antenna system (AS) 
electrical system test AD82.62-P-6000-
02A
3Radio frequency 
connecting line, 
antenna system (AS) 
electrical system testMODELS 202.078/080/083/182/188AD82.62-P-6000-02B
4Voltage supply, 
antenna system (AS) 
electrical system test AD82.62-P-6000-
03A
5FM/AM amplifier 
power consumption, 
antenna system (AS) 
electrical system test AD82.62-P-6000-
04A
6FM/AM amplifier 
ground connection, 
antenna system (AS) 
electrical system test AD82.62-P-6000-
05A
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 238 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1734 of 4133
Fig. 139: Amplifier Control Mo dule Test Electrics LSA 
AMPLIFIER CONTROL MODULE TEST ELECTRICS LSA - AD82.62-P-6001-01D 
Model 163 with sound system    
Fig. 140: Amplifier Control Mo  dule Test Electrics LSA
 
SPEAKER TEST ELECTRICS LSA - AD82.62-P-6001-02M 
Models 163/168   
Fig. 141: Speaker Test Electrics LSA
 
SPEAKER TEST ELECTRIC  S LSA - AD82.62-P-6001-02O 
Models 163, 168, 202, 210  
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electr ical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 239 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1735 of 4133
Fig. 142: Speaker Test Electrics LSA 
SPEAKER TEST ELECTRICS LSA - AD82.62-P-6001-02P 
Models 163 /168    
Fig. 143: Speaker Test Electrics LSA
 
SPEAKER TEST ELECTRIC  S LSA - AD82.62-P-6001-02R 
Models 163, 168, 202, 210   
Fig. 144: Speaker Test Electrics LSA
 
SPEAKER TEST ELECTRICS LSA - AD82.62-P-6001-02S 
Model 163 with sound system    
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electr ical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 240 © 2006 Mitchell Repair Information Company, LLC.  
     
        
        Page 1736 of 4133
Fig. 145: Speaker Test Electrics LSA 
SPEAKER TEST ELECTRICS LSA - AD82.62-P-6001-02T 
Model 163 with sound system    
Fig. 146: Speaker Test Electrics LSA
 
SPEAKER TEST ELECTRIC  S LSA - AD82.62-P-6001-02U 
Model 163 with sound system   
Fig. 147: Speaker Test Electrics LSA
 
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electr  ical System - Body - 163 Chassis  
me  
Saturday, October 02, 2010 3:30:08 PMPage 241 © 2006 Mitchell Repair Information Company, LLC.