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Practical tips
Checking the battery electrolyte
l
evel
Fig. 238
Sight glass on the top of the 12 volt
batt
ery (schematic representation).
The electrolyte level should be checked reg-
ul
arly in high-mileage vehicles, in hot coun-
tries and in older batteries.
●
Check the colour display in the sight glass
on the top of the battery
›››
Fig. 238. Ensure
sufficient lighting to clearly identify the colour
shown in the battery window. Never use
flames or objects that burn without a flame
as a light source.
●
If there are air bubbles in the window, tap
the window gently until they disperse.
The “magic eye” indicator, located on the top
of the battery changes colour, depending on
the charge state and electrolyte level of the
battery.
There are two different colours:
The battery's electrolyte
level is too low. Go to a specialised work-
shop to have the battery checked and
replaced if necessary.
The battery’s electrolyte level is cor-
rect.
Charging or changing the battery
If you often drive short distances or if the ve-
hicl
e is not driven for long periods, the 12-volt
battery should be checked by a specialised
workshop more frequently than the service
intervals.
If the battery has discharged and you have
problems starting the vehicle, the battery
might be damaged. If this happens, we rec-
ommend you have the vehicle battery
checked by a Technical Service where it will
be re-charged or replaced.
Charging the battery
The vehicle battery should be charged by a
specialised workshop only, as batteries using
special technology have been installed and
they must be charged in a controlled environ-
ment.
Yellow or colourless:
Black:
Replacing a vehicle battery
The 12-v
olt vehicle battery has been de-
signed to suit its location and has specific
safety features. If the battery needs to be re-
placed, it is recommended that it be installed
by an official SEAT qualified workshop. These
workshops have the technical documenta-
tion and equipment required to find out the
size, technology, and maintenance and safe-
ty requirements of the new battery.
Always use maintenance-free batteries
according to the TL82506 and VW75073
standards. These standards must be from
October 2014 or later.
The degassing tube must always be connec-
ted to the hole on the negative pole side and
the hole on the positive pole side must be
sealed.
The vehicle’s 12V battery must always be re-
placed by a qualified specialist company, as
the vehicle’s electronics must be adapted
during replacement. In addition, the battery
parameters for functional safety have been
determined based on the original battery.
Only a qualified specialist company has the
right technology to fit the correct replace-
ment battery.
The use of unsuitable batteries could inva-
lidate the vehicle registration certificate.
Start-Stop systems (
›››
page 223) are equip-
ped with a special battery. Therefore, it must
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