A vehicle comprising an undercarriage, an upper carriage arranged rotatably about a vertical axis with respect to the undercarriage and a leverage means arranged pivotably about a horizontal axis with respect to the upper carriage, wherein - a sensor system is provided for monitoring at least one stability criterion with respect of a tilt movement of the vehicle, and wherein - a control unit is coupled to the sensor system for automatically initiating an action and/or performing an action for stabilizing the vehicle, depending on the at least one stability criterion, wherein the sensor system comprises a sensor unit for monitoring the position of the upper carriage with respect to the undercarriage, characterized in that the sensor system is provided for monitoring a position of the upper carriage with respect to the undercarriage and an inclination and/or length of the leverage means with respect to the upper carriage, wherein the sensor unit comprises - detecting plates (116a, 116b, 116c) formed as ring sectors which are arranged at a circumferential portion of a slew unit between the upper carriage and the undercarriage and being in operative connection with at least one detector for detecting a movement or position of the detecting plates (116a, 116b, 116c) relative to the at least one detector, the detecting plates (116a, 116b, 116c) being attached asymmetrically to the outer circumference of a circular carrier plate of the slew unit arranged at the undercarriage such that the detecting plates (116a, 116b, 116c) indicate positions of the slew unit which characterize circumferential portions indicating a tolerable position of the upper carriage with respect to tilt stability of the vehicle while sectors (22a, 22b) in between indicate positions which may cause instability; - wherein a sensor signal is issued if and as long as a detecting plate (116a, 116b, 116c) is in operative connection with the at least one detector and irrespective whether or not the vehicle is in an unstable condition; - wherein the sensor system comprises an inclination sensor for monitoring an inclination of the vehicle with respect to a horizontal or substantially horizontal ground so that information about the sensed position and/or inclination of the upper carriage and/or leverage means can be combined together with the sensed inclination of the vehicle as input parameters for the control unit which issues a signal if an unstable condition for the vehicle is detected. - a sensor system is provided for monitoring at least one stability criterion with respect of a tilt movement of the vehicle, and wherein - a control unit is coupled to the sensor system for automatically initiating an action and/or performing an action for stabilizing the vehicle, depending on the at least one stability criterion, wherein the sensor system comprises a sensor unit for monitoring the position of the upper carriage with respect to the undercarriage, characterized in that the sensor system is provided for monitoring a position of the upper carriage with respect to the undercarriage and an inclination and/or length of the leverage means with respect to the upper carriage, wherein the sensor unit comprises - detecting plates (116a, 116b, 116c) formed as ring sectors which are arranged at a circumferential portion of a slew unit between the upper carriage and the undercarriage and being in operative connection with at least one detector for detecting a movement or position of the detecting plates (116a, 116b, 116c) relative to the at least one detector, the detecting plates (116a, 116b, 116c) being attached asymmetrically to the outer circumference of a circular carrier plate of the slew unit arranged at the undercarriage such that the detecting plates (116a, 116b, 116c) indicate positions of the slew unit which characterize circumferential portions indicating a tolerable position of the upper carriage with respect to tilt stability of the vehicle while sectors (22a, 22b) in between indicate positions which may cause instability; - wherein a sensor signal is issued if and as long as a detecting plate (116a, 116b, 116c) is in operative connection with the at least one detector and irrespective whether or not the vehicle is in an unstable condition; - wherein the sensor system comprises an inclination sensor for monitoring an inclination of the vehicle with respect to a horizontal or substantially horizontal ground so that information about the sensed position and/or inclination of the upper carriage and/or leverage means can be combined together with the sensed inclination of the vehicle as input parameters for the control unit which issues a signal if an unstable condition for the vehicle is detected.