| 301 |
All audio sources without function, except for warning signals |
| 302 |
An audio channel is missing (right/left - front/rear) |
| 303 |
Speed-dependent volume control does not work or is too quiet |
| 304 |
Interference noise in all audio sources |
| 305 |
No volume control |
| 306 |
No bass |
| 307 |
No heights |
| 308 |
No balance settings |
| 309 |
No fader settings |
| 310 |
No mute function |
| 311 |
Sporadic muting of audio playback on starting a trip |
| 312 |
Sporadic failure of audio playback and display (only E89x USA/Canada) |
| 313 |
Fluctuations in volume |
| 314 |
No audio playback after vehicle start (only E8x, E9x) |