Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Data transfer between COMAND and instrument cluster, function - GF82.85-P-3008PMU
MODELS 203.0 /2 /7 as of 24.4.04 with CODE (528) HIGH Class USA
MODELS 203.0 /2 /7 as of 24.4.04 with CODE (530) COMAND APS USA (with navigation system)
Operation of the COMAND operating, display and control unit (A40/3) at the multifunction steering wheel (MFL)
With the aid of the multifunction steering wheel (MFL) buttons and the multifunction display (A1p13) in the instrument cluster (A1), the following systems controlled by the COMAND operating, display and control unit (A40/3) can be operated and information on the systems can be displayed:
- Audio systems (e.g. radio)
- Navigation system
- Telephone
The entire exchange of data between the instrument cluster (A1) and the COMAND operating, display and control unit (A40/3) occurs over the Controller Area Network Bus Class B (interior) (CAN-B).
All actuations of the buttons on the multifunction steering wheel (MFL) are read in by the instrument cluster (A1) over the local interconnect network (LIN). The instrument cluster (A1) links these signals with the system currently displayed on the multifunction display (A1p13) (audio, navigation, telephone). This interpretation is necessary because the operation of the buttons depends on the current content of the multifunction display (A1p13). The interpreted data are subsequently sent from the instrument cluster (A1) to CAN-B and received by the COMAND operating, display and control unit (A40/3).
Changing the system shown on the multifunction display (A1p13) does not have an effect on what is being shown on the display of the COMAND operating, display and control unit (A40/3); however, what is shown on the display of the COMAND operating, display and control unit (A40/3) does have an effect on what is shown on the multifunction display (A1p13).
The instrument cluster (A1) receives the current time from the COMAND operating, display and control unit (A40/3) since this time is automatically received from the Global Positioning System (GPS). As such, the time setting does not need to be reset.
| Volume/tone adjustments, function | GF82.60-P-2003PMU | ||
| Radio mode, function | GF82.60-P-2001PMU | ||
| CD-player mode, function | GF82.60-P-2002PMU | ||
| Navigation mode, function | Except code (528) HIGH Class USA | GF82.85-P-2012PMU | |
| Telephone mode, function | with code (388) portable CTEL telephone, UPCI system | GF82.85-P-2007PMU |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.