Backrest Adjuster, Removing And Installing: Removing
-- Move the front seat all the way forward/up.
-- Turn the backrest adjustment wheel -1- until one catch is visible from behind -arrow A-. If necessary use a flash light.
-- Attach the Assembly Tool :3399 to the catch and pry off the hand wheel in direction of -arrow B-.
-- Turn the backrest adjustment wheel 120° further and repeat the process.
-- Remove the backrest adjustment handwheel.