![](https://www.audimanual.ru/img/q/3926.jpg)
To achieve the best controllability of the infotainment complex, telephone and navigation system, a number of buttons are built into the steering wheehp Tiptronic, additional control switches for this system are installed on the left and right. Used multifunction steering wheel -J453- (under the right button) reads button press information and transmits it via the LIN bus (single-wire bus) to the steering column electronics control unit -J527-. The information from the used steering column electronics -J527- is transmitted via the CAN bus (Comfort) and diag. Data bus interface -J533- to individual devices. Troubleshooting is carried out in the mode "Guided troubleshooting".
- 1. Multi-function buttons
- 2. Bolt. 3 Nm
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Complete set in MMI version 1. Multifunction steering wheel; 2. Used steering column -J527- on the steering column; 3. Data bus diagnostic interface -J533- (behind the glove box on the left); 4. CD changer -R41- (in the glove box); 5. Radio receiver -R- (MMI) (behind the left trunk trim); 6. Used communication electronics 1 -J794- (in the front panel); 7. Used digital acoustic package -J525- (behind the left trunk trim); 8. TV tuner -R78- (behind the left trunk trim); 9. CAN bus (Comfort)
Removing the multifunction steering wheel buttons
Turn off all electronics. consumers. Turn off the ignition. Remove the driver's airbag. Remove the decorative ring from the steering wheel. Disconnect plug connection -1- at multifunction steering wheel button -2-.
![](https://www.audimanual.ru/img/q/3928.jpg)
Press button -2- in direction of arrow from steering wheel. Rotate the multifunction button. Disconnect plug connection -2- from Tiptronic switch on multifunction steering wheel button -1- and remove button.
![](https://www.audimanual.ru/img/q/3929.jpg)
Installation
Install in reverse order. Removing the left button of the multifunction steering wheel is carried out in a similar way.
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