How to fix the disabled lane-assist on a 2015 Audi S3

Method 1: If this happened after tinting, the likely culprit is an evaporated drop of tint solution blocking the sensor. To fix this, carefully remove the camera and the pyramid before cleaning off the residue. The camera should recalibrate itself after you drive it around for a few minutes. To avoid this in the future, either be extremely cautious when removing any excess water or simply cut around the matrix with a knife when you tint it.