Audio 30 APS, function - GF82.61-P-0002A

MODEL 163,168,170, 208, 210 with CODE (353) Audio 30 APS 

Fig 1: Identifying Radio And Navigation Unit

The Audio 30 APS  has the following functions:

• Radio 

  Performance corresponds to an MB radio in the superior class (3/99)

• Navigation system 

  Performance and function are comparable with the current auto-pilot system (APS) (status 3/99)

• Combined CD player  for audio and navigation
• Audio signal processing and amplification  with control of optional units, e.g.:

  Amplifier for sound system (N40/3) and CD changer (A2/6)

• Digital data bus (D2B)  and CAN data bus  interface

The system is distinguished by its high degree of integration resulting in optimum compactness. The following components are integrated into the radio and navigation unit (A2/56)  :

• CD-ROM drive for navigation and playing audio CD's
• Navigation processor including global positioning system (GPS) receiver and gyrosensor
• Radio with two-tuner technology
• 4-channel power amplifier for vehicle loudspeakers

System interlinkage 

The radio and navigation unit (A2/56)  is provided with the following components for data exchange with external digital components:

• CAN (A1 -A2/56) 

  The radio and navigation unit (A2/56)  is connected with the instrument cluster (A1)  via a separate CAN bus. The difference to the other CAN systems is indicated by the spelling CAN bus (A1-A2/56). The CAN bus (A1-A2/56) allows the following functions:

  • Operation of the radio and navigation unit (A2/56)  is also possible with the multifunction steering wheel.
  • The multifunction display (A1/p13)  in the instrument cluster (A1)  can display navigation information on the current operating status of the radio and navigation unit (A2/56)  .

  The connection to the CAN bus (A1-A2/56) is only realized on models 208 and 210. (Status 3/99)

• Digital data bus (D2B) 

  Data can be exchanged between the external audio components, the telephone system and - if present - the voice control system over the D2B  bus. This allows control data  as well as the actual audio signals  (e.g. music from CD changer) to be transferred.

  The only additional D2B component presently possible is the CD changer (A2/6)  (Status: 3/99)

• K bus (diagnostic interface) 

  Data exchange is accomplished between the diagnostic interface and the hand-held tester (reading out DTCs and actual values, ...).

  The communication between the HHT and all other D2B components is accomplished over the radio and navigation unit (A2/56)  diagnostic interface.