S5 Quattro Coupe V8-4.2L (CAUA) (2009)
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Unclip the slide retainer - 1 -.
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Release the locking tab - 4 - in the - direction of the arrow -.
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Move the slide - 3 - with the backrest lock switch - 1 - in the - direction of arrow A or B -.
‹› Leave the spacer sleeve (T40180) installed on the pins when adjusting the backrest lock switch.