User Manual - Page 159

For MII 2014.

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Checking and refilling levels
recommends you have the battery replaced
by a technical service.
Use only maintenance-free genuine batteries
conforming to TL 825 06 and VW 7 50 73
Standards. These standards must be dated
April 2008 or later.
Vehicles fitted with the Start-Stop system are
equipped with a special battery. Therefore,
this battery must only be replaced by another
with the same specifications.
Disconnecting the vehicle's battery
If you must disconnect the battery from the
electrical system, please note the following:
Switch off the ignition and all electrical
equipment.
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 36
. Respect the maximum service in-
t
er
vals permitted Booklet Maintenance
Programme.
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 to 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 the battery runs 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.
WARNING
Incorrectly securing the battery or using the
wrong battery can cause short-circuits, fire
and serious injuries.
Always use only maintenance-free batter-
ies, protected to prevent a leak, and whose
properties, specifications and size corre-
spond to the standard battery.
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.
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157
Technical specifications
AdviceOperationSafety
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