The 2022 Mercedes-Benz C-Class Active Lane Keeping Assist provides steering assistance to help maintain lane position. When a fault message appears, Mercedes' ADAS has detected an issue requiring attention beyond normal operating limitations.
Active Lane Keeping Assist Function
Mercedes' Active Lane Keeping Assist monitors lane markings and provides steering torque to help keep the vehicle centered. It can also provide warning vibrations when lane departure is detected. The system works with other Mercedes driving assists for comprehensive safety.
What Causes Assist Faults
Several issues trigger Active Lane Keeping Assist faults. Camera system failures prevent lane detection. Windshield replacement without calibration causes inaccurate detection. Electronic control module faults interrupt system operation. Steering assist system issues affect corrective capability.
Fault vs. Unavailable
A fault is more serious than unavailable status. Unavailable means conditions prevent operation. A fault indicates the system has detected an internal problem that won't resolve when conditions improve. Faults require diagnosis and repair.
Mercedes ADAS Integration
Active Lane Keeping Assist integrates with Mercedes' broader driver assistance package. Camera faults may affect multiple features—adaptive cruise, collision warning, and lane keeping often share sensors. Understanding this helps identify shared vs. unique issues.