Minor Repairs 291
Charge state
A well-charged battery prevents starting problems
and has a longer service life.
In order to avoid unintentional battery
discharge:
f Switch off unnecessary electrical loads in city
traffic, on short trips or in a line of traffic.
f Always remove the ignition key when leaving
the vehicle or
switch off the ignition on vehicles with Porsche
Entry & Drive.
f Avoid using the Porsche Communication
Management system and the audio system
when the engine is not running.
f Please see the chapter “CHARGING THE
BATTERY” on page 293.
Information
In the cold season in particular or if the vehicle
is used primarily for short distances, it may be
necessary to recharge the battery from time to
time.
Battery care
f Ensure that battery is securely mounted.
f Keep battery surface clean and dry.
f Keep terminals and connections clean.
Corrosion can be prevented by coating the
terminals and connections with petroleum jelly
or silicone spray.
f Ensure that terminal clamps and the vent
hose are firmly secured.
Winter driving
The ability of the battery to deliver and store
power decreases at low outside temperatures.
Moreover, the battery is more heavily loaded in the
winter months, e.g. by the heated rear window,
the more frequent use of additional lights,
the blower and the windshield wipers, etc.
f Have the charge state of the battery checked
at your authorized Porsche dealer before
winter begins.
Information
Keep the battery fully charged to prevent it from
freezing.
A flat battery can freeze even at 23 °F (–5 °C),
but a fully charged one only freezes at --40 °F
(–40 °C).
f If the battery is frozen, thaw it out before
connecting jumper cables.
Vehicle storage
If the vehicle is left for long periods in the garage
or workshop, the doors and lids should be closed.
f Remove the ignition key and, if necessary,
disconnect the battery.
Information
f When the battery is disconnected, the alarm
system ceases to function.
If the vehicle was locked before the battery
was disconnected, the alarm will be triggered
when the battery is reconnected.
To deactivate the alarm system:
f Lock the vehicle and unlock it again.
Alarm system, central locking
f The status of the central locking and alarm
system does not change when you disconnect
the battery.
Information
Even if you put your vehicle out of operation,
the battery still discharges.
f The battery must be charged, i.e. connected
to a charger, approximately every 6 weeks
in order to preserve battery function.
f Store a battery that has been removed in
a dark, cool place that is not exposed to frost.
Replacing the battery
The battery is subject to normal wear: its service
life depends heavily on the care you give it,
climatic conditions and the conditions of use
(distances, loads).
It is not possible to use the details on the battery
case to determine a comparable battery that
meets all the specific requirements of Porsche.
f Have the battery removed and installed only by
your authorized Porsche dealer.
f Only use an original Porsche battery, with the
correct part number, as a replacement. Only
this battery meets the specific requirements of
the vehicle.
f After you install a new battery, it must be
initialised in the control unit.
Please contact your authorized Porsche
dealer.
f Please observe the disposal instructions for
batteries.
English 
