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.