See also:

System self-test
After you have switched on the ignition, the system carries out a self-diagnosis. WARNING A malfunction in the system has been detected if one of the following conditions occurs:  - ...

High-beam headlamps (halogen headlamps)/cornering lamps (Bi-Xenon headlamps)
•► Switch off the lights. •► Open the hood. •► Turn housing cover 1 counter-clockwise and pull it out. •► Turn bulb holder 2 counter-clockwise and pull it out. •υ ...

Important safety notes
Have the batteries changed at a qualified specialist workshop. WARNING Batteries contain toxic substances. Swallowing batteries can lead to serious health issues or death. Keep batteries out ...