Abstract: A system for manual repositioning a vehicle seat includes a rail and complementary slide, a seat moving orthogonally to the rail and a pivoting seatback. A slide sensor has first and second sensor portions integral to the slide and rail. The slide sensor measures distances between the first and the second sensor portions. A control unit connects to the first and/or second sensor portions and receives a distance signal proportional to sensor positions. A memory element stores a distance signal in a selected position. A signalling unit stores a preferred position of the slide relative to the chassis, measures relative movement between the slide and rail, compares the distance signal determined by the slide sensor in an actual position of the slide with a preferred distance signal, and emits a notification signal when actual preferred positions are coincident. Other arrangements are for height and reclination adjustment.