AN82.70-P-0002-03P Retrofitting Cellular Telephone Wiring Harness

AN82.70-P-0002-03P Retrofitting Cellular Telephone Wiring Harness
- MODEL 203.0
- except CODE (855) TELE AID in combination with COMAND or radio in the Audio range






1 Prepare telephone wiring harness (2) and microphone wiring harness (3) as shown in figure.

Connection diagram for telephone

A28/3 E-network compensator
A34/4 Telephone interface
B25 Microphone for hands-free system
F34 Interior fuse box
W7 Ground (right wheel housing in trunk)
X1/16 Roof antenna connector
X30/8 Wakeup signal plug connector
X39/5 Handset transmitter and receiver connector
X58/3 Microphone separation point






2 Route wiring harness (2 and 3) along existing leads in vehicle as shown in figure.

A28/3 E-network compensator
A34/4 Telephone interface
B25 Microphone for hands-free system
F34 Interior fuse box
W7 Ground (right wheel housing in trunk)
X1/16 Roof antenna connector
X30/8 Wakeup signal plug connector
X39/5 Handset transmitter and receiver connector
X58/3 Microphone separation point






3 Route branch-off line from telephone wiring harness (2) to the handset transmitter/receiver connector (X39/5) in the center console in the area of the heating controls.

A2 Radio






4 Route telephone wiring harness (2) in cable duct in front of driver side and/or passenger side.

X39/5 Handset transmitter and receiver connector






5 Remove cover for interior fuse box (F34) on left of instrument panel.






6 Route branch-off line from wiring harness to the interior fuse box (F34) and connect to light blue fuse location A (arrow).






7 Route blue/black lead (bl/sw) for telephone wiring harness (2) to wakeup signal connector (X30/8) on right A-pillar and insert into chamber 3 for black connector.
8 Route telephone wiring harness (2) and microphone wiring harness in right cable duct.






9 Insert separation point for microphone (X58/3) into the cable duct on the right rear door.






10 Route branch-off lines from wiring harness (2) of roof antenna connector (X1/16) to right C-pillar and connect at the antenna line. Fasten wiring harness with adhesive felt.






11 Route branch-off line from telephone wiring harness (2) in the trunk.






12 Connect antenna lines and voltage supply for wiring harness (2) at the E-network compensator (A28/3).
13 Connect branch-off line from the wiring harness (2) at the telephone interface (A34/4).






14 Connect brown wire (br) to ground (right wheel housing in trunk) (W7).






15 Route microphone wiring harness (3) at the right A-pillar to the headliner and behind the headliner to the overhead control panel (arrow).






16 Connect microphone wiring harness (3) at microphone of hands-free system (B25).