Seat Toledo 2019 Owner's Manual page 256

Colourless or light yellow – acid level too
●
low, battery must be changed.
Note
The battery acid level is also regularly
●
checked during servicing at authorised
SEAT dealers.
The electrolyte level on "AGM" batteries
●
cannot be checked for technical reasons.
Vehicles equipped with the "Start-Stop"
●
system include a battery control unit to
control the battery level for repeated en-
gine starting.
Winter service
At low temperatures the battery provides only
a fraction of the starting power it has at nor-
mal temperatures.
A flat battery can also freeze at tempera-
tures slightly below 0°C (+32°F).
We therefore recommend you have the bat-
tery checked and, if necessary, charged at
an official SEAT technical service before the
start of winter.
Charging the battery
A fully-charged battery is essential for relia-
ble starting.
254
Practical tips
Switch off the ignition and all electrical
–
equipment.
Only in the case of "fast charge": discon-
–
nect both battery connection cables (first
the "negative" terminal and then the "posi-
tive").
Connect the charger cables to the battery
–
terminals (red = "positive", black = "nega-
tive").
Plug in the battery charger and switch on.
–
At the end of the charging process: turn off
–
and unplug the charger.
Remove the charger cables.
–
If necessary, reconnect both battery ca-
–
bles to the battery (first the "positive" cable,
then the "negative" cable).
When charging with a low current (e.g. with a
small battery charger), the battery does not
normally have to be disconnected. The in-
structions of the battery charger manu-
facturer must be followed.
Use a current equivalent to or lower than 10%
of the battery capacity to fully charge the
battery.
Before "fast-charging" the battery however,
both battery cables must be disconnected.
"Fast-charging" a battery is dangerous and
requires a battery charger and special knowl-
edge. Fast charges should be performed by
an official technical service.
The battery caps should not be opened while
the battery is being charged.
CAUTION
In vehicles fitted with the "Start-Stop" sys-
tem, the charger cable cannot be directly
connected to the negative terminal of the
vehicle battery but must be attached to the
›››
engine ground point  page
Disconnecting and connecting the
battery
The following functions will either be inopera-
tive or will not work properly after discon-
necting and reconnecting the battery:
Function Installation
›››
Setting the clock page 99
The multifunction display
›››
page 101
data is deleted
Note
We recommend having the vehicle checked
by an authorised SEAT dealer to guarantee
the correct working order of all electrical
systems.
54.