Retrofit hands-free system wiring harness - AZ82.70-P-0005-02TTA

Prepare wiring harness as shown in figure.

Fig 1: Identifying Hands-Free System Wiring Harness
Route wiring harness in the vehicle as shown in the figure.

Fig 2: Identifying Hands-Free System Wiring Harness (In Vehicle)
Prepare voltage supply wiring harness (20) as shown in the figure.

Fig 3: Identifying Voltage Supply Wiring Harness
Open rear SAM control unit with fuse and relay module (N10/2) and uncover plug positions 20 and 27.
Insert relay from parts kit at plug position C.
Provide fuse system (5 and 14) with 7.5 A fuse.

Fig 4: Identifying Relay Module
Connect voltage supply wiring harness (20) with the white voltage supply connector (23) to CAN wiring harness (4).
Insulate the second white connector (24) and strap down (not required).
Connect black voltage supply connector (27) to plug position 27 of rear SAM control unit with fuse and relay module (N10/2).
Insert flat plug bushing (26) at plug position 20 of rear SAM control unit with fuse and relay module (N10/2) into chamber 1.

Fig 5: Identifying Flat Plug Bushing, Voltage Supply Connector And Plug
Route CAN wiring harness (4) along existing lines on the left from the rear SAM control unit with fuse and relay module (N10/2) to the side wall.

Fig 6: Identifying Relay Module And CAN Wiring Harness Route
Connect ground (left taillamp in trunk) (W6/1).

Fig 7: Identifying Ground (Left Taillamp In Trunk)
Route branch-off line from CAN wiring harness (4) via the control unit plate along existing lines to the right and secure using tie straps.

Fig 8: Identifying Branch-Off Line Route
Route CAN wiring harness (4) in the area of the right rear seat in the frame floor system and from there route to the right A-pillar.

Fig 9: Identifying CAN Wiring Harness Route
Route branch-off line from the wiring harness (4) to the hands-free system interface box (3) and, for the hands-free system speaker connector (SP), on to the right knee bolster.

Fig 10: Identifying Speaker Connector, Branch-Off Line Route And Interface Box
Route branch-off line to the microphone (MIC) along the right A-pillar to the headliner and behind the roof lining to the left-hand side of the overhead control panel.
Connect supplied hands-free system microphone (6) and adhere to the left-hand side of the overhead control panel pointing toward the driver.

Fig 11: Identifying Hands-Free System Microphone

When routing the lines ensure at the top of the A-pillar that the cable is routed in front of the headbag tensioning strap (toward the windshield). Fasten lines with self-adhesive felt.
Route radio mute extension line (9) along the left side wall toward the left frame floor system.

Fig 12: Identifying Rear SAM Control Unit With Fuse And Relay Module
Uncover violet radio mute connector (41) in the area of the left door sill molding in the frame floor system and connect the radio mute extension line (9).

Fig 13: Identifying Violet Radio Mute Connector And Radio Mute Extension Line
Unplug green (gn), 2-pin MQS plug (arrow) at the rear SAM control unit with fuse and relay module (N10/2) from plug position 11, open connector and remove lines (green casing is no longer required).
Briefly provide vehicle with power and switch on ignition. Check whether the radio volume can still be adjusted using the multifunction steering wheel. If this is not the case, then the correct CAN plug has been removed. If not, then plug positions 8 through 10 must be individually checked.

Fig 14: Unplugging MQS Plug At Rear SAM Control Unit
Insert the removed brown line (br) into the supplied blue connector housing in chamber 2. Insert the brown/red line (br/rt) into chamber 1. Close the blue connector housing (10) and connect to the blue plug housing of the CAN wiring harness (4).

Fig 15: Identifying Connector Housing, Brown/Red Line And CAN Wiring Harness
Connect green connector (gn) from the CAN wiring harness at plug position 11 to rear SAM control unit with fuse and relay module (N10/2).

Fig 16: Connecting Green Connector