A vehicle component has a sensor device that includes a sensor for detecting a characteristic parameter for an obstacle in the vicinity of the vehicle, for example an obstacle in a movement area of the door. The damper device can be actuated in a manner which is dependent on the parameter. A monitoring device is provided which, in order to detect a characteristic parameter for a manipulation of the vehicle, for example damage of a vehicle exterior shell or removal of a vehicle interior compartment, is operatively connected to the sensor device, in order for the latter to be interrogated.

A motor vehicle door includes an arrester device having a magneto-rheological fluid for holding the motor vehicle door in position, and a coil for solidifying the magneto-rheological fluid that is disposed adjacent to a liquid-tight interior space, with the interior space containing one or more components which can be moved relative to other components in the interior space. A relative movement between these components is slowed down by solidifying the magneto-rheological fluid and the slowing down of the relative movement causes the motor vehicle door to be held in position. The coil is part of a switchable hard magnet which is selected such that a sedimentation-stable, magneto-rheological fluid is obtained. The motor vehicle door may thus be reliably held in a freely selectable position.

A vehicle includes a first member and a second member moveable relative to the first member. A compliant member is compressible between the first member and the second member. A compression control device is attached to one of the first member and the second member for engaging another of the first member and the second member, or the compliant member. The compression control device is moveable between a first position and a second position. When disposed in the first position, the compression control device is not engaged with the first member, the second member, or the compliant member, and allows compression of the compliant member into a first compressive state. When disposed in the second position, the compression control device is engaged with one of the first member, the second member, or the compliant member, and is operable to compress the compliant member into a second compressive state.

The invention relates to a motor vehicle door comprising a door leaf with a drive, a magnetic device as a component of the drive, and at least one sensor which is associated with the door leaf. According to the invention, said magnetic device also comprises a magnetorheological element and/or a magnetohydrodynamic element which can be actuated by at least one magnet.