80 Lighting system exterior lighting control assists you while checking the bulbs ( Y page 77). R In order to avoid a short circuit, - switch off the lights before changing a bulb and - turn the key to position 0 in the ignition lock R Wear eye protection and gloves when removing defective bulbs. Driver's workstation R Dirt on the glass bulb reduces the operating life of the bulb. Do not hold the glass bulb with your bare hands. If necessary, clean the glass bulb with alcohol or spirit while it is cold and wipe with a lint-free cloth. R Only hold bulbs with a clean, lint-free cloth or a similar item. Do not perform this work with wet or greasy fingers.
R Always replace defective bulbs with the specified new bulbs, i.e. those with the cor- rect wattage and voltage. R Do not use a bulb if it has been dropped or if its glass has been scratched. The bulb could explode. You could be injured by shards of glass from a broken bulb. R Keep bulbs out of the reach of children. R Test the contacts for corrosion and clean them if necessary. R Check that all seals are positioned cor- rectly, and replace damaged seals. R If the new bulb does not light up, consult a qualified specialist workshop. R Only use bulbs in closed lamps designed for the purpose. R Protect bulbs from moisture when in use and do not allow them to come into contact with liquids.
R Have the headlamp setting checked regu- larly. R Have the following bulbs replaced at a qualified specialist workshop: - bi-xenon bulbs - LED daytime running lamp - navigation lights in the LED daytime run- ning lamp