Step 1: Select Car, Settings, then Driver Assistance on the infotainment system.
Step 2: From this point, select Safety and Warnings.
Step 3: Scroll down to Lane Assist or Lane Change Warning (varies by model year).
Step 4: You should now be able to choose between Early, Medium, Late, or Off.
Step 5: Select Off to disable your lane assist.
The steps are fairly similar if you decide you want to turn your BMW lane assist back on:
Step 1: Select Car, Settings, then Driver Assistance.
Step 2: Select Driver Assistance, followed by Safety and Warnings.
Step 3: Select either Lane Assist or Lane Departure Warning again.
Step 4: Finally, select On.
Look for a green car icon within two parallel lines on either side (typically located on the upper left-hand side of your dashboard screen) to see if it has been activated successfully.
Keep in mind: Be aware, however, that the lane departure will not engage unless you’re traveling more than about 43 MPH.
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