Notes on D2B ring - AH82.70-P-0001-03G

MODEL 170 as of 7/1/98 with CODE 316 (MB D-net telephone (D2B)) with CODE 317 (D-net portable CTEL (D2B)) without CODE 351 (Auto Pilot System (APS)) 

• The components in the D2B ring (station components) in this case are: - Radio (A2)
  • Telephone interface (A34/4) (for vehicles with code 316 or 317)
• The information in the D2B ring only flows in one direction (arrows). The information enters in the white insert (white) in an optical fiber module M1 and M2 and exits again in the red insert (red) at the next ring component. The D2B ring only is capable of functioning as a closed circuit.
  Fig 1: Identifying Radio Communication Diagram

  Courtesy of MERCEDES-BENZ USA
• The telephone interface (A34/4) with code 316 Fixed installation (A) and code 317 Cell phone (B) are located in the trunk on a control unit plate.
• Before the D2B ring can be expanded it is first necessary to determine the current vehicle configuration
  Fig 2: Identifying Cell Phone And Trunk On Control Unit Plate

  Courtesy of MERCEDES-BENZ USA

Actual configuration in vehicle with fixed telephone installation or cell phone 

• Print out the actual configuration of the vehicle and use as conversion template.
  Fig 3: Radio And Telephone Interface Configuration Diagram

  Courtesy of MERCEDES-BENZ USA