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(up to MY2009) Note ♦ Before working on headlights with gas discharge bulbs, al‐ ways switch off headlights and remove ignition key. ♦ The automatic headlight range control on headlights with gas discharge bulbs is equipped with self-diagnosis. ♦ When dealing with complaints, it is absolutely necessary to understand the functions and the operation of the lighting sys‐ tem ⇒ Operating instructions . ♦ Additional information ⇒ Current flow diagrams, Electrical fault finding and Fitting locations. Fault detection and fault display -J519- are equipped with self-diagnosis. system -VAS 5051B- in „Guided fault finding“ mode. 3.1 Operation and safety notes for gas dis‐ charge bulbs WARNING ♦ Never change bulbs if you are not familiar with the appro‐ priate procedures, safety precautions and tools. – If repairs are to be made to the headlights with gas discharge bulbs, observe the following: ♦ Notes on dangerous high voltage/currents ⇒ page 258 ♦ Notes on pressure/temperature/radiation/arcs ⇒ page 259 ♦ Assembly notes for gas discharge bulbs ⇒ page 260 ♦ Disposal regulations for gas discharge bulbs ⇒ page 260 Special tools and workshop equipment required WARNING Control units for light systems, connectors and components pertaining to bulb holders conduct lethally high voltage. with the bulb fitted. 258
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