The concept

This system issues a warning at speeds above approx. 40 mph/65 km/h if the vehicle is about to leave the lane on roads with lane markings.

The steering wheel begins vibrating lightly.

The system does not issue a warning if the turn signal is set before leaving the lane.

    See also:

    Malfunction
    A Check Control message is displayed. The parking assistant failed. Have the system checked. ...

    Activating/deactivating the functions
    Several menu items are preceded by a checkbox. It indicates whether the function is activated or deactivated. Selecting the menu item activates or deactivates the function. The function is acti ...

    Viewing stored Check Control messages
    Viewing stored Check Control messages 1. Press the button on the turn signal lever downward. "CHECK OK" or the stored Check Control messages appear on the display. „CHECK OK“ is show ...