| The position of the rotary light switch -E1- can be read from the measured values of the onboard supply control unit -J519- (09 — Electronic central electrics). |
| If the headlights are modified or refitted, the coding in the onboard supply control unit -J519- must be changed. |
| If the rear lights are modified or refitted, the coding in the convenience system central control unit -J393- must be changed. |
| If a defect is detected in the light switch -E1-, the onboard supply control unit -J519- automatically switches on the driving lights. |
| If the driver's door is opened and an exterior light function is still active, the control unit in dash panel insert -J285- triggers a warning tone on the buzzer. |
| The coding in the onboard supply control unit -J519- can only be performed using Software Version Management. |
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