Release mechanism for seat recliner assembly

A seatback adjustment assembly comprising:

• a first bracket plate adapted to be rotationally fixed to a seatback;
• a recliner heart mounted to the first bracket plate and including a first plate and a second plate, the recliner heart operable in an unlocked state in which the second plate is rotatable relative to the first plate and a locked state in which the second plate is fixed relative to the first plate;
• an attachment plate rotationally fixed to the second plate and including first teeth;
• and
• a lever rotatably coupled to the first bracket plate and including second teeth, the lever rotatable between a first state in which the second teeth are meshingly engaged with the first teeth and a second state in which the second teeth are disengaged from the first teeth,
• wherein when the recliner heart is in the unlocked state and the lever is in the first state, rotation of the second plate and the attachment plate causes corresponding rotation of the seatback relative to a seat bottom, and wherein the first bracket plate is configured to rotate to move the seatback relative to the seat bottom without causing corresponding rotation of the second plate and the attachment plate when the lever is in the second state.