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Checking and refilling levels
connections. This could cause an electrical
fire.
●
Ensur
e that the vent hose is always con-
nected to the battery.
●
Never use damaged batteries. This could
cause an explosion! Replace a damaged
battery immediately.
CAUTION
●
Ne
ver disconnect the batt
ery if the igni-
tion is switched on or if the engine is run-
ning. This could damage the electrical sys-
tem or electronic components.
Charging the battery
Terminals for charging the battery are fitted in
the engine compartment.
–
Note the warnings
›
›
›
in Important safe-
t
y w
arnings f
or handling a vehicle bat-
tery on page 330 and
›››
.
–
Switch off all electrical devices. Remove
the ignition k
ey.
–
R
aise the bonnet
›
››
page 18.
–
Open the battery cover.
–
Connect the charger clamps as described
to the positive pole of the battery (+) and
exclusively to an earth on the bodywork
(–).
–
Only use a charger which is compatible for
use with 12 V nominal voltage batteries. The
charge must not exceed a voltage of 15 V.
–
Now connect the battery charger to the
power socket and switch on.
–
At the end of the charging process: switch
off the battery charger and disconnect the
power socket cable.
–
Finally disconnect the charger cables from
the battery.
–
Replace the battery cover correctly.
–
Close the bonnet
›››
page 18.
Important: Before you charge the battery
make sure you read the manufacturer's in-
structions for using the battery charger.
WARNING
Never charge a battery that has frozen: re-
place it! F
ailure to do so may lead to an ex-
plosion.
Note
Use only the terminals in the engine com-
partment to char
ge the battery.
Replacing the battery
The new battery should have the same speci-
fications (amperage, l
oad and voltage) as
the used battery.
Your vehicle is equipped with an intelligent
power management system to control the
distribution of electrical energy
›››
page 261.
The power management function ensures
that the battery is charged much more effi-
ciently than on vehicles without a power
management system. To maintain this func-
tion after replacing the battery, we recom-
mend that the replacement battery used is of
the same make and type as the original fitted
battery. To make proper use of the power
management function after the battery has
been changed, have the battery coded to the
power management mode at a specialised
workshop.
CAUTION
●
Some vehicles, f
or example those with
the Start-Stop system* are fitted with a
special battery (AGM-type or EFB-type
battery). If any other type of battery is fit-
ted, the Start-Stop function may be consid-
erably reduced and the vehicle may not
stop on repeated occasions.
●
Make sure that the vent hose is always
attached to the original opening on the
side of the battery. Gases or battery acid
»
331
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