| Fault detection and fault display: |
| The onboard supply control unit has a self-diagnostic function, which makes fault finding on tail light easier. |
| For fault finding, use vehicle diagnosis, testing and information system -VAS 5051A- in „Guided fault finding“ mode. |
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| Before renewing a bulb, always switch off the concerned electrical consumer. |
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| Switch off ignition and all electrical consumers and remove ignition key. |
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| Do not touch the glass bulb with bare fingers; use a clean cloth glove. When the light bulb is switched on, the heat would vaporise the oil of the finger prints which would then settle on the reflector, impairing the brightness of the headlight. |
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| A light bulb must always be renewed with a bulb of the same sort. The designation appears on the base of the bulb or on the glass bulb. |
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| Properly engage connector during installation and ensure tight seating of the connection. |
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