BMW X3 Owners Manual: System limits

The system may not be fully functional in the following situations:

• In heavy fog, rain or snowfall.
• In the event of missing, worn, poorly visible, merging, diverging, or multiple lane markings such as in construction areas.
• When lane markings are covered in snow, ice, dirt or water.
• In tight curves or on narrow lanes.
• When the lane markings are covered by objects.
• When driving very close to the vehicle in front of you.
• When driving toward bright lights.
• When the windshield in front of the interior rearview mirror is fogged over, dirty or covered with stickers, etc.
• During calibration of the camera immediately after vehicle shipment.