A seat adjuster device for setting a first part of a motor vehicle seat relative to a second part comprising a curved piece connected to the first part and having a center and a regular front face; and a support piece connected to the second part and mounted to rotate about the center, and having a first and second clamping bevel. A stop layer is provided on a substrate. Once the smart card interface has detected that the memory card has been inserted, the interface requests data from the card.