CITROEN DS3 Handbook page 81

RACING front seats
Seat consisting of a seat cushion and backrest which can be adjusted to adapt your position for maximum ease of driving and comfort.
Manual adjustments
Forwards-backwards adjustment
F Lift the control and slide the seat forwards
or backwards.
Before moving the seat backwards, ensure that there is nothing that might prevent the full travel of the seat, so as to avoid the risk of of
jamming the seat caused by the presence of objects on the floor behind the seat or rear passengers. If the seat jams, stop the movement
immediately.
Height adjustment
F Pull the handle upwards to raise or push
it downwards to lower, as many times as
necessary to obtain the required position.
Backrest angle adjustment
F Push the handle towards the rear and move
the seat backrest forwards or backwards.
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Comfort