Page 1809 of 4133
Fig. 213: Identifying Fiber Optical Cable (D2B) Components
Fig. 214: Identifying Fiber Op tical Cable (D2B) Components  
Fig. 215: Identifying Exchange D2B Wi  ring Harness And Heater Housing
 
 Remove  
 Notes on fiber optic cableModels 129, 163, 168, 170,  
202, 203, 208, 209,  
210,215,220,230,463AH82.70-P-0001-
02A
1Remove radio AR82.60-P-7502EA
2Cut through the existing D2B 
wiring harness as far as  
possible from the connector on   
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electr  ical System - Body - 163 Chassis  
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        Page 1810 of 4133

REMOVE/INSTALL ANTENNA SPLITTER - AR82.70-P-8953GH 
MODEL 163.113 /136 /154 /157 /172 /174 
the radio
3Remove cover under 
instrument panel on driver's 
side AR68.10-P-1500GH
4Unscrew screw on Sound 
amplifier (A2/13) and 
disconnect D2 B-plug  
5Cut the existing D2B wiring 
harness as far as possible away 
from the plug for the sound 
amplifier  
 Install   
6Plug the plug of the exchange 
D2B wiring harness into the 
sound amplifier (A2/13)  
7Fasten sound amplifier (A2/13) 
with screw  
8Route exchange D2B wiring 
harness (1) along existing 
wiring harness to the center of 
the instrument panel Danger of breaking! Do 
not kink or stretch fiber optic 
cable Before routing, push 
the caps onto the plugs.AR82.95-P-0005-
01A
9Route exchange D2B wiring 
harness (1) next to the heater 
housing (2) downwards and 
behind the bracket of the 
control module for automatic 
transmission/connector for 
interior wiring harness Ensure that the D2B 
wiring harness does not cross 
other lines/wiring harnesses. 
Fasten existing D2B wiring 
harness to existing wiring 
harness using tie straps. 
10Route exchange D2B wiring 
harness (1) upwards to the 
radio installation opening Fasten D2B wiring 
harness to existing wiring 
harness using tie straps. 
11Install cover under the 
instrument panel on the driver's 
side AR68.10-P-1500GH
12Plug the plug of the exchange 
D2B wiring harness (1) into the 
radio  
13Install radio AR82.60-P-7502EA
 
2001 Mercedes-Benz ML320 
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
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        Page 1811 of 4133
Fig. 216: Identifying Antenna Splitter Components 
REMOVE/INSTALL ELECTRONIC COMPASS - AR82.85-P-7371GH 
MODELS 163.113 /154 /172 /174 #A as of 221506, 163.113 #X as of 734088, 163.128 /157 /175 with CODE 
(245) Trip computer  
  Remove/install  
 Information on preventing 
damage to electronic 
components due to 
electrostatic discharge AH54.00-P-0001-01A 
1Open rear-end door  
2Remove liner on tailgate AR72.20-P-3520GH 
3Remove bolts (1, 2)  
4Disconnect electrical 
connectors (3)  
5Remove radio antenna 
splitter (A2/5)  
6Install in the reverse order  
 
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        Page 1812 of 4133

Fig. 217: Identifying Electronic Compass 
COVER FIBER OPTIC CABLE - AR82.95-P-0005-01A 
 Do not remove protective covers too early from the fiber optic cable coupling (3) or the device connection 
(4) because contaminated or scratched surfaces may absorb the light. Fiber optic cables must not be kinked, 
routed over sharp edges or bent in radii of less than 25 mm, otherwise the fiber optic cable core will be 
yellowed and broken. Yellowed or broken fiber optic cables weaken the light. 
 The work procedure is shown on components of the digital data bus (D2B). 
1. Carefully detach the fiber optic cable coupling (3) from the device connection (4) and cover it with a 
protective cap (1), stop plug (2) or a clean rag. 
  Remove/Install  
1Remove door sill molding 
in load compartment AR68.30-P-4100GI 
2Remove electronic 
compass (B26)  
3Install in the reverse order  
4.1Calibrate compass and 
perform zone adjustment Only when the 
compass is replaced. 
 Service Information: 
Compass in trip computer SI54.50-P-0001A
 
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        Page 1813 of 4133
 The protective cap (1) and stop pl ug (2) for the digital data bus (D2B) components are not separately  
available. The protective caps (1) a  nd plugs (2) of installed replacement pa rts must be used. The components of  
the Media Oriented System   Transport (MOST) must be covered up with  clean rags, as generally they are not  
fitted with protective caps (1) and plugs (2).  
Fig. 218: Covering Fiber Optic Cable Coupling   And Device Connection With Protective Cap
 
REMOVE/INSTALL CONTROL MODULE FOR E-CALL EMERGENCY CALL SYSTEM - AR82.95-P-0008GH 
MODELS 163.113 /128 /154 /157 /172 /174  /175 with CODE (349) E Call emergency call system with  
CODE (460) Additional parts Canadian   vehicles with CODE (494a) USA version   
Fig. 219: Identifying E
-Call Control Module Components 
  Remove/install  
 
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        Page 1814 of 4133
![MERCEDES-BENZ ML320 1997  Complete Repair Manual  Front seats 
REPLACE FIBER OPTICAL CABLE (D2B) BETWEEN THE RADIO AND E-CALL CONTROL MODULE/CTEL [TEL] 
INTERFACE (AFTER TESTING) - AR82.95-P-0015GH 
MODEL 163.136 #A as of 051500, 163.136 #X as of 70 MERCEDES-BENZ ML320 1997  Complete Repair Manual  Front seats 
REPLACE FIBER OPTICAL CABLE (D2B) BETWEEN THE RADIO AND E-CALL CONTROL MODULE/CTEL [TEL] 
INTERFACE (AFTER TESTING) - AR82.95-P-0015GH 
MODEL 163.136 #A as of 051500, 163.136 #X as of 70](/manual-img/4/57305/w960_57305-1813.png)
 Front seats 
REPLACE FIBER OPTICAL CABLE (D2B) BETWEEN THE RADIO AND E-CALL CONTROL MODULE/CTEL [TEL] 
INTERFACE (AFTER TESTING) - AR82.95-P-0015GH 
MODEL 163.136 #A as of 051500, 163.136 #X as of 708319, 163.154 #A as of 051500, 163.154 #X as of 
708319, 163.172 #A as of 051500, 163.172 #X as of 708319, 163.113/128/157/174/175 with CODE (852) 
CTEL preinstallation assembly at dome with CODE (854) MB portable cellular telephone  
MODEL 163.154 /172 /174 #A as of 221506, 163.157/175 with CODE (349) E Call emergency call system 
with CODE (494a) USA version  
1Remove fuse f8 from fuse 
and relay module  
2Unscrew screws on front 
seat console *BA91.10-P-1001-01B
3Angle front seat back 
until it rests against the 
rear bench seat and fasten 
with outer seat belt Remove wiring 
harness for E-call speaker 
from E-call bracket. 
Cover the floor covering 
behind the front seat to 
avoid contamination. 
4Detach connector (2) and 
antenna plug (4) from the 
E-call control module 
(A35/8)  
5Detach conductive 
coupling D2B (3) Do not kink or stretch 
fiber optic cable. Press 
protective caps on 
conductive coupling and 
device connection.AR82.95-P-0005-01A
6Unscrew screws (5)  
7Remove E-call control 
module (A35/8)  
8Install in the reverse order  
NumberDesignationModel Series 163
BA91.10-P-1001-01BBolt of seating mounting 
bracket to vehicle floorNm40
 
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        Page 1815 of 4133

Fig. 220: Identifying CTEL Interface, Radio And Navigation Unit And Exchange D2B Wiring Harness 
 Remove  
 Notes on fiber optic 
cableModels 129, 163, 168, 170, 202, 
203, 208, 209, 
210,215,220,230,463AH82.70-P-0001-02A
 Fiber optic cable, 
locationMODEL Series 163GF82.00-P-4000-
01GH
1Remove radio (A2) AR82.60-P-7502EA
2Remove center console AR68.20-P-2000GH 
3.1Remove E-call control 
module (A35/8) with 
bracket Only with E-Call emergency 
call system, code 349. Do not 
take the control module out of 
the bracket.AR82.95-P-0008GH
3.2Remove CTEL [TEL] 
interface (A34/4) with 
bracket Only with complete portable 
CTEL preinstallation on dome 
code 852 or with MB portable 
CTEL, code 854. Do not take 
control module out of the 
bracket. 
 Install   
4Pull white insert of the 
D2B wiring harness out 
of the D2B plug on the  Risk of breakage! Do not 
kink or stretch fiber optic cable
 USA version only: when the AR82.70-P-0004-01A
 
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        Page 1816 of 4133
![MERCEDES-BENZ ML320 1997  Complete Repair Manual E-call control module/ 
CTEL [TEL] interface 
and replace with the 
white insert of the 
exchange D2B wiring 
harnessvoice control system (SBS) is 
installed, the white D2B insert 
should be removed f MERCEDES-BENZ ML320 1997  Complete Repair Manual E-call control module/ 
CTEL [TEL] interface 
and replace with the 
white insert of the 
exchange D2B wiring 
harnessvoice control system (SBS) is 
installed, the white D2B insert 
should be removed f](/manual-img/4/57305/w960_57305-1815.png)
E-call control module/ 
CTEL [TEL] interface 
and replace with the 
white insert of the 
exchange D2B wiring 
harnessvoice control system (SBS) is 
installed, the white D2B insert 
should be removed from the 
voice control system control 
module and not from the E-call 
control module/CTEL [TEL] 
interface. 
 Pay attention to the correct 
installation position of the insert 
in the D2B plug. Cut off the 
fiber optical cable removed at 
the adhesive tape.
5Route exchange D2B 
wiring harness (1) 
under the floor 
covering to the 
transmission tunnel  
6Route exchange D2B 
wiring harness (1) at 
the top of the 
transmission tunnel to 
the center part of the 
instrument panel Route fiber optical cable 
under the air duct. Guide it past 
all components on the left side. 
7Route exchange D2B 
wiring harness (1) 
behind the instrument 
panel to the radio 
installation opening  
8Remove red insert of 
the D2B wiring harness 
from the D2B plug on 
the radio and replace 
with the red insert of 
the exchange D2B 
wiring harness Risk of breakage! Do not 
kink or stretch fiber optic cable
 Pay attention to the correct 
installation position of the insert 
in the D2 B-plug. Cut off the 
fiber optical cable removed at 
the adhesive tape.AR82.70-P-0004-01A
9Fasten exchange D2B 
wiring harness (1) to 
the existing D2B 
wiring harness of the 
radio  
10.1Install CTEL [TEL] 
interface (A34/4) with 
bracket Only with complete portable 
CTEL-preinstallation on dome, 
code 852 or with MB portable 
CTEL, code 854. 
   *BA91.10-P-1001-01B
   *BA91.40-P-1001-01D
 
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1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis  
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