3 Series E91 325xi (N52) TOUR
The CD drive is able to play standard audio CDs or CDs with compressed audio data (MP3/WMA). WMA
(Windows Media Audio) is a compression standard, like MP3 (MPEG Layer 3, i.e. Moving Pictures Expert
Group).
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DSC: Dynamic Stability Control
The Dynamic Stability Control control unit sends a road speed signal. This signal is used to control speed-
dependent volume control.
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SZL: Steering column switch cluster
The steering column switch cluster supplies the signals for the multi-function steering wheel (MFL). The
information is sent on the K-CAN and processed by the radio.
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KOMBI: Instrument cluster
> E87, E90, E91, E92
The instrument cluster is the unit master in the vehicle. The time, external temperature and consumption values,
for example, are sent to the radio.
These settings can also be made via the radio with the BMW "Professional" radio and higher.
> R56
On the R56, the time, outside temperature and fuel consumption data (for example) are transmitted by the
auxiliary instrument (KOMBI2) to the K-CAN.
Depending on the equipment fitted, the instrument cluster (KOMBI) may have recesses for:
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Radio control panel
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Central Information Display (CID) on vehicles with Car Communication Computer (CCC)
The radios output the following signals via the loudspeakers:
For all radios:
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Audio signals
From BMW "Professional" or MINI "Boost CD" radio:
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Park Distance Control (PDC)
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Acoustic warnings (e.g. acoustic signals)
System functions
BMW "Audio"/MINI "Wave" radio
BMW "Business CD"/MINI "Wave CD" radio
These radios are almost identical in their functions and construction. They are operated in the same way as radios
that have featured in other models, such as the E46.
The radios do not have a digital sound processor (DSP) to generate sound. Therefore, they do not support signal
generation as is necessary for the Park Distance Control System (PDC), for example. The signal tones in this case
are generated by the corresponding control units themselves.
BMW "Professional" / MINI "Boost CD" radio
The BMW "Professional" radio and MINI "Boost CD" radio are radios for the MOST network.
The CD drive can play both standard audio CDs and CDs with compressed audio data (MP3/WMA).
The BMW "Professional" radio and MINI "Boost CD" radio have the following functions:
Gateway
The radio forms the interface for data exchange between the MOST bus and the K-CAN. The two bus systems
use different data transmission rates and data formats. In order to communicate with both systems, the data
from one bus is converted to a compatible format for the other in the radio.
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System master
SBT Radio E87, E90, E91, E92, R56
BMW AG - TIS
10.02.2013 21:40
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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