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WARNING (Continued)
■
Keep the vehicle battery away from people who are not completely inde-
pendent, especially children.
■
Do not tilt the battery otherwise battery electrolyte may flow out of the
battery vent openings.
WARNING
When working on the car battery, there is the risk of explosion, fire, injury
or irritation! The following guidelines must be observed.
■
Avoid smoking, the use of open flames or light and any activities that
could cause sparks.
■
A discharged vehicle battery can freeze slightly. Never charge up a fro-
zen or thawed vehicle battery. Replace a frozen vehicle battery.
■
Never use a damaged vehicle battery – risk of explosion!
■
Do not connect the battery terminals with each other by bridging the two
poles of a short circuit.
CAUTION
Ensure that battery acid does not come into contact with the bodywork – risk
of damage to the paintwork.
Note
■
We recommend having all work on the vehicle battery carried out by a spe-
cialist garage.
■
You should replace batteries older than 5 years.
Checking the condition
Fig. 302
Vehicle battery: Electrolyte level
indicator
Read and observe and on page 265 first.
The battery condition is checked regularly by a specialist garage as part of the
inspection service.
Check the acid level
For car batteries with acid level indicator, use the colouration of the display to
check the acid level. In vehicle batteries with the designation “AGM” there is
no acid level examination.
Air bubbles can influence the colour of the indicator. For this reason carefully
tap on the indicator before carrying out the check » Fig. 302.
Black colour - electrolyte level is correct.
Colourless or light yellow colour - electrolyte level too low, the battery must
be replaced.
Battery discharge
Frequent short journeys will not sufficiently recharge the car battery.
The battery capacity decreases at low temperatures.
If the vehicle is not used for longer than 3 to 4 weeks, then disconnect the
negative terminal
or charge the battery constantly with a very low charging
current.
Charging
Read and observe and on page 265 first.
Only charge the vehicle battery when the ignition and all consumers are
switched off.
Refer to the instructions of the charger manufacturer.
Charging
›
For vehicles with START-STOP system or auxiliary heating, connect the
terminal of the charger on the pole of the battery, the terminal of the
charger to the earth point of the engine » page 279.
›
For vehicles without START-STOP system or auxiliary heating, connect the
terminals of the charger to the corresponding battery poles ( at . at
).
›
Plug the mains cable of the charger into the power socket and switch on the
device.
266
General Maintenance
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