PEUGEOT RCZ Handbook page 183

Installing electrical accessories
Your vehicle's electrical system is designed to operate with
standard or optional equipment.
Before installing other electrical equipment or accessories on your
vehicle, contact a PEUGEOT dealer or a qualifi ed workshop.
PEUGEOT will not accept responsibility for the cost incurred in
repairing your vehicle or for rectifying malfunctions resulting from
the installation of accessories not supplied and not recommended
by PEUGEOT and not installed in accordance with its instructions,
in particular when the combined consumption of all of the
additional equipment connected exceeds 10 milliamperes.