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

WARNING: This page does not describe the selected car, but rather 203 other vehicles, including the 2020 Mercedes-Benz SLC300, 2020 Mercedes-Benz SL550, 2020 Mercedes-Benz SL450, 2020 Mercedes-Benz S65 AMG, and 2020 Mercedes-Benz GLA250. However, it is still accessible from the selected car via links, so may be relevant.

MODEL 129 with CODE 316 (MB D-net telephone (D2B)) with CODE 317 (D-net portable CTEL (D2B)) without CODE 347 (TELE AID emergency call system (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)
The information in the D2B ring only flows in one direction (arrows). The information enters in the white insert (white) in a fiber optic cable 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: Radio Communication Diagram
Courtesy of MERCEDES-BENZ USA
The telephone interface (A34/4) is mounted in the left of the trunk on a control unit bracket.
Before the D2B ring can be expanded it is first necessary to determine the current vehicle configuration

Fig 2: Identifying Telephone Interface And Control Unit Bracket
Courtesy of MERCEDES-BENZ USA

Actual configuration in vehicle

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