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Home >> Mercedes Benz >> 2002 >> C240 Standard >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Entertainment/Navigation, Headlights, Wiper/Washer -- Retrofitting & Conversion -- 203 Chassis >> Retrofitting & Conversion >> Retrofit hands-free system wiring harness - AZ82.70-P-0005-02PBP

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

With COMAND 

  1. Expose connection for telephone handset (A34) in radio recess.
  2. Connect antenna for the telephone handset (A34) to the antenna line of the PSC adapter.

    IMPORTANT Use the antenna adapter enclosed if necessary (depends on the vehicle version).

    Fig 1: Identifying Telephone Handset
    G04736334
  3. Connect VDA connection line (5) to the interface box for the hands-free system (3).
    Fig 2: Identifying VDA Connection Line And Hands-Free System
    G04736335
  4. Route the connection line (5) from the interface box for the hands-free system (3) as shown in the Figure to the exposed CTEL separation point for the portable CTEL (X39/37) into the radio recess and connect.

    IMPORTANT Fasten wiring harness with adhesive felt.

    Fig 3: Identifying Hands-Free System And Portable CTEL Connection Line
    G04736336
  5. Disconnect standard production coupling chamber A and B on the COMAND operating, display and control module (A40/3) and connect to the voltage supply wiring harness. Connect intermediate coupling from the wiring harness (20) to the radio.
    Fig 4: Identifying COMAND Operating, Display And Control Module
    G04736337
  6. Prepare CAN wiring harness (4) as shown in the Figure.
    Fig 5: Connection Schematic Diagram For CAN Wiring Harness
    G04736338
  7. Connect CAN wiring harness (4) to ICANI box (2) and connect the ICANI connection coupling (7) to the free coupling of the interface box for the hands-free system (3).
  8. Route CAN wiring harness (4) to the radio recess fasten with adhesive felt.
    Fig 6: Identifying CAN Wiring Harness, ICANI Box, ICANI Connection Coupling And Hands-Free System
    G04736339
  9. Disconnect the standard production coupling from the COMAND operating, display and control module (A40/3) and detach coupling housing from the contact carrier (A). Mount the new coupling housing (12) (contained in the kit) on the standard production wiring harness. Insert contact carrier (A) in the new coupling housing (12). Provide contact carrier (B) of the CAN wiring harness (4) with the remaining coupling housing.
    Fig 7: Disconnecting Standard Production Coupling From COMAND Operating, Display And Control Module
    G04736340
  10. Connect standard production coupling with the plug (11) from the CAN wiring harness CAN (4).
  11. Provide intermediate coupling from CAN wiring harness (4) with the remaining coupling housing and connect to the COMAND operating, display and control module (A40/3).
    Fig 8: Identifying COMAND Operating, Display And Control Module
    G04736341
  12. Connect microphone wiring harness (22) to the connection coupling (MIC) in the radio recess and route under the glove box to the right A-pillar and from there upwards to the roof liner and fasten with adhesive tape.

    IMPORTANT On vehicles with head airbag when routing at the upper A-pillar, ensure that routing takes place in front of the tensioning strap of the head airbag (towards the windshield).

    Fig 9: Identifying Microphone Wiring Harness
    G04736342
  13. Stick microphone (6) to the mirror base with double-sided adhesive tape (contained in the parts kit) and connect.

    IMPORTANT Align microphone so that pickup opening points towards driver.

    Fig 10: Locating Microphone
    G04736343
  14. Connect hands-free speaker (21) to the connection plug and route to the cover for the front passenger knee bolster. Install speaker at the predetermined point.

    IMPORTANT Use commercially available screws for the installation.

    Fig 11: Identifying Hands-Free Speaker
    G04736344