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194 Breakdown assistance
* NOTE Damage to the battery through
self-discharging
If dirt enters the battery cell, battery self-dis‐
charging will accelerate and the battery may
be damaged.
Only clean batteries when the caps are
#
screwed on.
Observe the following points on battery care:
Regularly check the battery terminals and the
#
fastening of the negative cable to the chassis
to ensure that they are firmly seated.
Lightly grease the undersides of the battery
#
terminal clamps with acid-resistant grease.
Only clean the battery housing with commer‐
#
cially available cleaning agents.
Disconnecting and removing the starter bat‐
tery
& WARNING Risk of explosion from hydro‐
gen gas igniting
There is a danger of hydrogen gas igniting
when charging the battery if there is a short
circuit or sparks start to form.
Make sure that the positive terminal of
#
the connected battery does not come
into contact with vehicle parts.
Never place metal objects or tools on a
#
battery.
The described order of the battery
#
clamps must be observed when con‐
necting and disconnecting the battery.
When giving starting assistance, always
#
make sure that you only connect battery
terminals with identical polarity.
During starting assistance, you must
#
observe the described order for con‐
necting and disconnecting the jumper
cable.
Do not connect or disconnect the bat‐
#
tery clamps while the engine is running.
& WARNING Danger of chemical burns
from the battery acid
Battery acid is caustic.
Avoid contact with the skin, eyes or
#
clothing.
Do not lean over the battery.
#
Do not inhale battery gases.
#
Keep children away from the battery.
#
Immediately rinse battery acid off thor‐
#
oughly with plenty of clean water and
seek medical attention immediately.
* NOTE Damage to electronic components
due to work carried out incorrectly on the
battery
If the starter battery is disconnected before
the key is removed from the ignition lock,
electronic components or assemblies, such
as the alternator, can be damaged.
Switch off the engine and remove the
#
key from the ignition lock.
Check to see that there are no indicator
#
lamps lit in the instrument cluster.
Always remove the negative terminal
#
clamp first and then the positive termi‐
nal clamp.
Do not interchange the battery clamps.
#
Always have work on the battery carried out at a
qualified specialist workshop.
If, in exceptional circumstances, you must dis‐
connect the battery yourself, pay attention to the
following:
Observe the notes on the 12 V battery
R
(
page 189).
/
Secure the vehicle to prevent it from rolling
R
away.
For vehicles with an automatic transmission,
R
the transmission is locked in position j after
disconnecting the battery. You can then no
longer move the vehicle.
The battery and the cover of the positive ter‐
R
minal clamp must be installed securely during
operation.
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