Retrofit power supply wiring harness - AN82.64-P-0001-03PA

Models 203.0, 203.2, 203.7 up to model refinement without COMAND operating and display system Code 352a, sound system Code 810, portable CTEL-preinstallation complete at upper center console Code 852, MB standard telephone Code 853, MB telephone portable CTEL Code 854, TELE AID Code 855. 

Prepare the wiring harness 

1. Disconnect the left voltage distributor (CAN) connector (X30/7) in the voltage supply wiring harness for the CD changer (1) and insulate the connector (no longer needed).
2. Disconnect the wake-up signal connector (X30/8) in the voltage supply wiring harness for the CD changer (1) and insulate the connector (no longer needed).
3. Remove the brown/red and brown lines in the voltage supply wiring harness for the CD changer (1) from the black, 10-pin radio coupling (A2), insulate them and strap them down (both are no longer needed).
   • Chamber 1 brown cable
   • Chamber 2 brown cable
     Fig 1: Identifying Power Supply Wiring Harness

     

Wiring harness, specified status 

4. Using a voltage distributor (10), connect both blue/black lines (bl/sw) in the voltage supply wiring harness for the CD changer (1) to each other.
   Fig 2: Identifying Power Supply Wiring Harness

   
5. Remove the brown/red line (br/rt) and brown line (br) in the standard radio wiring harness from the black, 10-pin radio coupling (A2).
   • Contact cavity 1 brown/red line (br/rt)
   • Contact cavity 2 brown line (br)

   The black 10-pin coupling C for the radio (A2) in the standard wiring harness is no longer needed.

   Fig 3: Identifying 10-Pin Radio Coupling

   
6. Install the brown/red (br/rt) lines and the brown (br) line removed from the standard radio wiring harness into the black 10-pin coupling for the radio (A2) in the voltage supply wiring harness (1).
   • Contact cavity 1 brown/red line (br/rt)
   • Contact cavity 2 brown line (br)
7. Using a voltage distributor, connect the blue/black lines to the voltage supply wiring harness for the CD changer (1).
   Fig 4: Identifying 10-Pin Radio Coupling

   
8. Use a knife to cut out the perforation in the glove compartment (see arrow).
   Fig 5: Identifying Cut Out Perforation In Glove Compartment

   
9. Route the 3-pin black coupling of the voltage supply wiring harness (1) behind the instrument panel carrier through the cutout and into the glove compartment.
   Fig 6: Identifying Voltage Supply Wiring Harness