Seat assembly for a vehicle, vehicle and methods

A method for transferring a seat assembly for a vehicle from a primary state in which a primary functional surface of the seat assembly is operational, into a secondary state in which the seat assembly is configured to receive a child, wherein the seat assembly comprises a back rest part having a primary back rest surface being configured to support a back of an adult sitting on the seat assembly and a sitting module comprising a first part and a second part, and wherein the first part carries the primary functional surface being configured to support a bottom and a portion of legs of the adult sitting on the seat assembly and a secondary back rest surface being configured to support a back of a child sitting on the seat assembly, the primary functional surface and the secondary back rest surface being arranged on opposite sides of the first part, the method comprising:

• translationally moving at least the first part away from the back rest part to remove an end portion of the first part from below a lower end of the back rest part to allow pivoting of the first part with respect to the second part;
• and
• pivoting the first part with respect to the second part such that the primary back rest surface and the secondary back rest surface face each other.

A method for transferring a seat assembly for a vehicle from a secondary state in which the seat assembly is configured to receive a child, into a primary state in which a primary functional surface of the seat assembly is operational, wherein the seat assembly comprises a back rest part having a primary back rest surface being configured to support a back of an adult sitting on the seat assembly and a sitting module comprising a first part and a second part, and wherein the first part carries the primary functional surface being configured to support a bottom and a portion of legs of the adult sitting on the seat assembly and a secondary back rest surface being configured to support a back of a child sitting on the seat assembly, the primary functional surface and the secondary back rest surface being arranged on opposite sides of the first part, the method comprising:

• pivoting the first part with respect to the second part such that the secondary back rest surface faces the second part;
• and
• translationally moving at least the first part towards the back rest part to arrange an end portion of the first part below a lower end of the back rest part to block pivoting of the first part with respect to the second part.