Adjusting device for automotive vehicle seat

The seat adjuster, comprising at least one slideway (1, 2) with an adjustable fixing member (3, 4), has a drive motor (5) with rotary outputs (6, 7) connected to the fixing members by sleeved transmission cables (8, 9). Each cable sleeve comprises a spiral spring made from a wound metal strip with rounded edges, a flocked inner surface and an outer tubular plastic covering.