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Opening the cover
Fig. 163 Polyester vehicle battery cover / plastic vehicle battery cover
Read and observe
and
The battery is located in the engine compartment - in some models, under-
neath a polyester cover
» Fig.
163.
›
Open the battery cover in the direction of the arrow
catch on the side of the battery cover in the direction of the arrow
.
›
fold the cover up and remove.
The battery cover is installed in reverse order.
Checking the battery electrolyte level
Read and observe
and
On vehicles with a vehicle battery fitted with a colour indicator
electrolyte level can be determined by looking at the change in colour of this
display.
174
General Maintenance
on page 173 first.
» Fig.
163- or press the
Fig. 164
Vehicle battery: Electrolyte level
indicator
on page 173 first.
» Fig.
Air bubbles can influence the colour of the indicator. For this reason carefully
knock on the indicator before carrying out the check.
›
Black colour - electrolyte level is correct.
›
Colourless or light yellow colour - electrolyte level too low, the battery must
be replaced.
Vehicles with a START-STOP system are fitted with a battery control unit for
checking the energy level for recurring engine start.
We recommend that you have the acid level checked regularly by a specialist
garage, especially in the following cases.
›
High external temperatures.
›
Longer day trips.
›
After each charge.
Winter time
The vehicle battery only has a proportion of the starting power in lower tem-
peratures. A discharged vehicle battery may already freeze at temperatures
just below 0 °C.
We therefore recommend that you have the battery checked and, if necessary,
recharged by a specialist garage before the start of the winter.
» Fig.
163-
Note
The battery acid level is also checked regularly by a specialist garage as part
■
of the inspection service.
For technical reasons, on vehicles with the description "AGM", the electrolyte
■
level cannot be checked.
Charging
Read and observe
A properly charged vehicle battery is essential for reliably starting the engine.
A charging operation can be performed if the following conditions are satis-
fied.
The engine is turned off.
The ignition is switched off.
All consumers are turned off.
The bonnet is open.
164, the
"Fast charging" with high currents
›
Disconnect both battery cables (first of all "negative", then "positive").
and
on page 173 first.
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