Rack-and-pinion drive comprising a drive rack and comprising a drive pinion, the drive rack and the drive pinion being movable relative to one another with a translational movement carried out in a feed direction, • in that the drive rack has drive rack bolts which are provided on a drive rack rod so as to form bolt gaps and are adjacent to one another in the feed direction, the bolt gaps having a gap width as seen in the feed direction and • in that the drive pinion can be driven by means of a drive motor about a pinion axis extending in the transverse direction of the feed direction with a rotary movement in a direction of rotation which extends in the circumferential direction of the drive pinion and in that the drive pinion has a pinion base body and a spur toothing provided on the pinion base body with teeth which are adjacent to one another in the circumferential direction of the drive pinion so as to form tooth gaps and which, as seen in the circumferential direction, have a tooth thickness which in turn is limited by two tooth flanks (28, 29) that are adjacent to one another in the circumferential direction at a mutual distance, wherein, in order to produce the translation movement, the teeth of the drive pinion which rotates in the direction of rotation run into the bolt gaps on the drive rack and act on the drive rack bolts with the tooth flank (28, 29) which leads in the direction of rotation, while the other of the tooth flanks (28, 29) is provided as the tooth flank (28, 29) which trails in the direction of rotation, characterized in that the teeth of the drive pinion have an adaptive tooth thickness, • in that the teeth of the drive pinion are divided to form a rigid tooth part and a movable tooth part, with one of the tooth flanks (28, 29) being provided on the rigid tooth part and one being provided on the movable tooth part, which tooth flanks limit the tooth thickness of the relevant tooth, • in that the rigid tooth part is rigidly connected to the pinion base body of the drive pinion in the circumferential direction of the drive pinion and • in that the movable tooth part is movable relative to the rigid tooth part in the circumferential direction of the drive pinion and can be positioned by means of an adjusting device, • the movable tooth part being movable relative to the rigid tooth part in the circumferential direction of the drive pinion by the movable tooth part being mounted on the pinion base body and/or on the rigid tooth part so as to be pivotable about a pivot axis which extends in parallel with the pinion axis of the drive pinion and is formed by a rotational joint which has on the movable tooth part and on the pinion base body and/or the rigid tooth part a joint socket on the one hand, and a joint head on the other hand, in that the teeth of the drive pinion have a maximum and a minimum tooth thickness due to their adaptivity, the maximum tooth thickness being at least as large as a maximum gap width of the bolt gaps of the drive rack bolts on the drive rack and the minimum tooth thickness not being greater than a minimum gap width of the bolt gaps and in that the thickness of the teeth run into the bolt gaps of the drive rack bolts can be adjusted by means of the adjusting device in such a way that the teeth are accommodated without play in the bolt gaps in the feed direction, in particular preloaded, with the rigid tooth part and the movable tooth part, against the drive rack bolts forming the relevant bolt gap. • in that the drive rack has drive rack bolts which are provided on a drive rack rod so as to form bolt gaps and are adjacent to one another in the feed direction, the bolt gaps having a gap width as seen in the feed direction and • in that the drive pinion can be driven by means of a drive motor about a pinion axis extending in the transverse direction of the feed direction with a rotary movement in a direction of rotation which extends in the circumferential direction of the drive pinion and in that the drive pinion has a pinion base body and a spur toothing provided on the pinion base body with teeth which are adjacent to one another in the circumferential direction of the drive pinion so as to form tooth gaps and which, as seen in the circumferential direction, have a tooth thickness which in turn is limited by two tooth flanks (28, 29) that are adjacent to one another in the circumferential direction at a mutual distance, • in that the teeth of the drive pinion are divided to form a rigid tooth part and a movable tooth part, with one of the tooth flanks (28, 29) being provided on the rigid tooth part and one being provided on the movable tooth part, which tooth flanks limit the tooth thickness of the relevant tooth, • in that the rigid tooth part is rigidly connected to the pinion base body of the drive pinion in the circumferential direction of the drive pinion and • in that the movable tooth part is movable relative to the rigid tooth part in the circumferential direction of the drive pinion and can be positioned by means of an adjusting device, • the movable tooth part being movable relative to the rigid tooth part in the circumferential direction of the drive pinion by the movable tooth part being mounted on the pinion base body and/or on the rigid tooth part so as to be pivotable about a pivot axis which extends in parallel with the pinion axis of the drive pinion and is formed by a rotational joint which has on the movable tooth part and on the pinion base body and/or the rigid tooth part a joint socket on the one hand, and a joint head on the other hand,