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

With radio 

1. Expose VDA connection for telephone handset (A34) and CTEL separation point (X39/37) in radio recess.
2. Connect antenna for the telephone handset (A34) to the antenna line of the PSC adapter.

   Use an antenna adapter if required (depends on the vehicle version).

   Fig 1: Identifying Telephone Handset

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
3. Connect VDA connection line (5) to the interface box for the hands-free system (3).
   Fig 2: Connecting VDA Connection Line To Interface Box

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
4. Route the connection line (5) from the interface box of the hands-free system (3) as per the Figure to the exposed CTEL separation point (X39/37) into the radio recess and connect.

   Fasten wiring harness with adhesive felt.

   Fig 3: Identifying Connection Line From Interface Box Of Hands-Free System

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
5. Prepare CAN wiring harness (4) as shown in the Figure.
   Fig 4: CAN Wiring Harness Diagram

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
6. 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).
7. Route CAN wiring harness (4) to the radio and fasten with adhesive felt.
   Fig 5: Connecting CAN Wiring Harness To ICANI Box

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
8. Disconnect the standard production coupling of chamber C to the radio (A2) and connect to plug (11) of the CAN wiring harness (4). Connect intermediate coupling for the radio (A2) from the CAN wiring harness (4) to the radio.
   Fig 6: Identifying CAN Wiring Harness

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
9. Only on vehicles without microphone preinstallation 
   • Expose existing separation point of hands-free system microphone (B25) behind the overhead control panel and connect microphone (6).
   • Stick microphone (6) to the mirror base with double-sided adhesive tape as shown in the Figure.

     Align microphone so that pickup opening points towards driver.

     Fig 7: Identifying Hands-Free System Microphone

     Courtesy of MERCEDES-BENZ OF NORTH AMERICA.