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Advice
●
The vehicle must be unlocked before dis-
connecting the battery, otherwise the alarm
will be triggered.
●
First disconnect the negative cable and
then the positive ››› .
Connecting the vehicle's battery
●
Before reconnecting the battery, switch off
the engine and all electrical devices.
●
First reconnect the positive cable and then
the negative ››› .
Different control lamps may light up after
connecting the battery and switching the ig-
nition on. They will be turned off after a short
trip at a speed of between 15-20 km/h
(10-12 mph). If the warning indicators remain
lit, please visit a specialised workshop to
have the vehicle checked.
If the battery has been disconnected for a
long time, it is possible that the next service
date is not displayed or calculated correctly
››› page 40
. Respect the maximum service in-
t
er
vals permitted ››› Booklet Maintenance
Programme.
Vehicles with Keyless Access (››› page 59): if,
after connecting the battery, the ignition can-
not be switched on, lock and unlock the vehi-
cle from outside. Then try to switch on the ig-
nition again. If the ignition does not work,
seek professional assistance.
Automatic device disconnection
The intelligent vehicle electrical system auto-
matically implements a range of measures to
prevent the battery from discharging when
high demands are made on it:
●
the idling speed is increased so that the al-
ternator provides more electricity.
●
where necessary, the power of the most
powerful devices is reduced or even com-
pletely disconnected.
●
On starting the engine, the power supply
from the 12-volt power sockets and the ciga-
rette lighter may be interrupted for a short
time.
The on-board management program cannot
always prevent the battery from running flat.
For example, if the ignition is left on for a
long period with the engine off or if the side
lights or parking lights are left on while the
vehicle is stationary.
Why does the battery run flat?
●
When stationary for a long time without
starting the engine, particularly if the ignition
is switched on.
●
Use of electrical devices with the engine
switched off.
●
If the auxiliary heater is running
››› page 128.
WARNING
Incorrectly securing the battery or using the
wrong battery can cause short-circuits, fire
and serious injuries.
●
Always use only maintenance free batteries
that do not run flat alone and whose proper-
ties, specifications and size correspond to
the standard battery. The specifications are
indicated on the battery case.
WARNING
A highly explosive mixture of gases is re-
leased when the battery is under charge.
●
The batteries should be charged in a well-
ventilated room only.
●
Never charge a frozen or recently thawed
battery. A flat battery can also freeze at tem-
peratures close to 0 °C (+32 °F).
●
Always replace a battery which has frozen.
●
Battery cables not correctly connected may
cause a short circuit. Reconnect first the posi-
tive cable and then the negative cable.
CAUTION
●
Never disconnect the battery if the ignition
is switched on or if the engine is running.
This could damage the electrical system or
electronic components.
●
Never plug accessories that supply current,
such as solar panels or a battery charger, to
the 12-volt power sockets or the cigarette
230
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