CITROEN DS5 Owner's Handbook Manual page 202

The headlamps are fitted with
polycarbonate glass with a protective
coating:
do not clean them using a dry
or abrasive cloth, nor with a
detergent or solvent product,
use a sponge and soapy water,
when using a high pressure washer
on persistent marks, do not keep
the lance directed towards the
lamps or their edges for too long,
so as not to damage their protective
coating and seals,
do not touch the bulb directly with
your fingers, use lint-free cloths.
Changing a bulb should only be done
after the headlamp has been switched
off for a few minutes (risk of serious
burns).
It is imperative to use only anti-
ultraviolet (UV) type bulbs in order not
to damage the headlamp.
Always replace a failed bulb with a
new bulb with the same type and
specification.
(xenon model)
Remove the protective plastic cover by
pulling on the tab.
Remove the connector with the bulb by
pressing on the lug at the bottom.
Remove the bulb and change it.
For reassembly, carry out these operations in
reverse order.
Dipped beam headlamps
(xenon model)
D1S xenon bulbs must be changed
by a CITROËN dealer or a qualified
workshop, as there is a risk of
electrocution.
It is recommended that the D1S bulbs
are changed at the same time when one
of them fails.