Input device having: a touchpad providing a touch-sensitive input surface or a touchscreen providing the touch-sensitive input surface, each having a touch detection device detecting a touch on the touch-sensitive input surface by an operator; a base designed to be positioned on the touch-sensitive input surface, and an input part mounted on the base such that it can move rotatably about an axis orthogonal to the touch-sensitive input surface in order to enable a manual operating input to be performed by the operator by adjusting the input part, which has a position transmitter fixed to the base or the input part for noncontact position detection; a position detection device interacting with the position transmitter for the detection of a position or adjustment of the input part, in order to assign a switching and/or control function to the detection result; magnetic and/or magnetizable means for effecting releasable magnetic adhesion of the base at least at two positioning locations on the touch-sensitive input surface, which has a first element on the base and at least one second element (6a, 6b, 6c, 6d, 6e) arranged in or under the touch-sensitive input surface and interacting magnetically with the first element, wherein the magnetic and/or magnetizable means predefine at least two positioning locations and are designed such that the magnetically effected adhesion, which can be overcome, differs at the two positioning locations, characterized in that the input device additionally has a latching device for producing a latching feel during the adjustment of the input part, and in that the latching feel varies at the two positioning locations, because, at one of the positioning locations, the magnetic adhesive force is so low in comparison with the action of a latching engagement of the latching device which inhibits the rotation that the base is able to rotate with respect to the touch-sensitive input surface, overcoming its adhesive friction, and magnetic fixing of the base is established at the other positioning location. a touchpad providing a touch-sensitive input surface or a touchscreen providing the touch-sensitive input surface, each having a touch detection device detecting a touch on the touch-sensitive input surface by an operator; a base designed to be positioned on the touch-sensitive input surface, and an input part mounted on the base such that it can move rotatably about an axis orthogonal to the touch-sensitive input surface in order to enable a manual operating input to be performed by the operator by adjusting the input part, which has a position transmitter fixed to the base or the input part for noncontact position detection; a position detection device interacting with the position transmitter for the detection of a position or adjustment of the input part, in order to assign a switching and/or control function to the detection result; magnetic and/or magnetizable means for effecting releasable magnetic adhesion of the base at least at two positioning locations on the touch-sensitive input surface, which has a first element on the base and at least one second element (6a, 6b, 6c, 6d, 6e) arranged in or under the touch-sensitive input surface and interacting magnetically with the first element, wherein the magnetic and/or magnetizable means predefine at least two positioning locations and are designed such that the magnetically effected adhesion, which can be overcome, differs at the two positioning locations, characterized in that the input device additionally has a latching device for producing a latching feel during the adjustment of the input part, and in that the latching feel varies at the two positioning locations, because, at one of the positioning locations, the magnetic adhesive force is so low in comparison with the action of a latching engagement of the latching device which inhibits the rotation that the base is able to rotate with respect to the touch-sensitive input surface, overcoming its adhesive friction, and magnetic fixing of the base is established at the other positioning location.