In the field of vehicle seats there is a need for an improved vehicle seat back tilt adjustment assembly that allows a user selectively to make small or large adjustments to the inclination of a vehicle seat back. A vehicle seat back tilt adjustment assembly comprises a guide member securable to a vehicle body; and an intermediate mechanism moveably coupled to the guide member. The intermediate mechanism includes first and second locking elements. The first locking element is moveable between a first configuration in which it is engagable with a vehicle seat back to secure the seat back to the intermediate mechanism and a second configuration in which the seat back is disengagable therefrom to allow the seat back to move independently of the intermediate mechanism. The second locking element selectively engages the guide member to secure the position of the intermediate mechanism relative to the guide member.