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| Before working on headlight with gas discharge lights and cornering lights, always switch off the headlights and remove the ignition key. |
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| The automatic headlight range control and cornering lights on headlights with gas discharge bulbs is equipped with self-diagnosis. |
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| When dealing with complaints, it is absolutely essential that the function and operation of the lighting system are first understood. |
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| Additional information: |
| The headlights with gas discharge bulbs and cornering lights (AFS = Adaptive Front Lighting System) have a „bi-xenon“ function. |
| With conventional „xenon“ headlights, the gas discharge bulbs only generate the dipped beam. The „bi-xenon“ features makes it possible to generate both the dipped beam and the main beam with „one“ gas discharge bulb. To achieve this, an electromechanical adjuster (left headlight screen adjustment solenoid -N395- or right headlight screen adjustment solenoid -N396-) uncovers the screened area of the dipped beam on actuation of the main beam, thus producing main beam light distribution. |
| This means that with „bi-xenon“ headlights the main beam is always automatically adjusted together with the dipped beam. |
| The headlights with gas discharge bulbs and cornering lights do not have an „additional main beam“. |
| The cornering light has the following features: |
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| Swivelling main and dipped beam (dynamic cornering light): at vehicle speeds above 10 and steering turned |
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| Cornering light bulb (static cornering light): when turning into tight bends (bend radius < 500 m) or when cornering at vehicle speeds below 50 . |
| Fault detection and fault display: |
| The automatic headlight range control, the cornering lights and onboard supply control unit feature self-diagnosis to facilitate fault finding for headlights with gas discharge bulbs. |
| Use the „guided fault finding“ mode on the vehicle diagnosis, testing and information system -VAS 5051B- to perform fault finding. |
Note | The „bulb failure“ warning lamp flashes in the dash panel insert if the headlight range control or the AFS has a fault. |
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