E 320 4MATIC Wagon (210.282) V6-3.2L (112.941) (1998)
The inserts (5) of the fiber optical cable modules may only be routed as in production. The fiber optical cable modules must always be provided with a
protective cap when routing. For every vehicle model, the sequence of components in the D2B ring is specifically predetermined. The components are
connected by fiber optical cable modules They are secured to a wiring harness with an orange-colored casing.
CAUTION: Danger of breaking. Do not kink fiber optical cable, route over sharp edges or bend in radii smaller than 25 mm. Tensile forces on inserts
must not exceed 65 N.
The fiber optical cable must not be exposed to temperatures greater than 85 degree C or lower than -40 degree C. Do not squeeze fiber optical cable,
in other words do not compress with clamps or tie straps.
Connection between the devices
The Digital Data Bus ring (D2B) connects the new radio generation and COMAND (monitor) to the CD changer (CDC) (USA preinstallation), telephone
and portable CTEL. The sound amplifier remains wired as before with models 129, 170, 202, 208 and 210. The radio and COMAND as head unit (HU)
performs the master function and also forms the interface to the Control Area Network bus Class B (interior) (CAN-B) (for vehicles with multifunction
steering wheel).
Ring sequence of vehicles/models/interface
Model 129
HU - telephone (or Tele Aid) - CDC - HU
Model 163
HU - sound - CDC - telephone (or Tele Aid) - HU
Model 168
HU - telephone - CDC - HU
Model 170
HU - telephone - HU (ECE); HU - CDC - HU (Japan)
Model 202/208
HU - CDC - telephone (or Tele Aid) - VCS - HU
Model 203/209
HU - sound - portable CTEL interface - VCS - CDC - HU
Model 210
HU - CDC - VCS - telephone (or Tele Aid) - HU
Model 215/220
HU - sound - CDC - telephone (or Tele Aid) - VCS - optional portable CTEL interface - HU
Model 230
HU - Sound - CDC - Telephone (or TELE AID) - VCS - HU
Model 414/463
HU - CDC - telephone - HU
NOTE: The sequence represents the current maximum equipment.If special equipment (SA) is omitted, the respective item is deleted, resulting in a new
ring sequence.
Read out actual configuration using STAR DIAGNOSIS
As of September 1999 it is possible to read out the current actual configuration of a functioning D2B ring by means of STAR DIAGNOSIS.
This is particularly important in the case of later expansion of the D2Bring and when retrofitting D2B components
e.g. telephone.
In the diagnosis system there is the menu item "Retrofitting D2B components". Under this menu item, the current actual configuration of a vehicle can be
read out and written back immediately as a new nominal configuration. The process is self-explanatory.