CITROËN DS3 Handbook page 236

F Unclip the bonnet stay c from its housing,
holding it by its foam protection.
F Fix the stay in the notch to hold the bonnet
open.
When the engine is hot, handle the
exterior safety catch and the stay with
care.
To avoid damaging the electric units,
the use of a high pressure jet wash
under the bonnet is strictly prohibited.
closing
F Take the stay out of the support notch.
F Clip the stay in its housing.
F Lower the bonnet and release it at the end
of its travel.
F Pull on the bonnet to check that it is fully
latched.