2020 Seat Leon Owner's manual

Checking and refilling levels
increased, but only up to 60 %; otherwise an-
tifr ee
ze protection will diminish and this will
worsen cooling.
When the coolant is topped up, use a mixture
of distilled water and at least 40 % of the
additive G12evo for optimal protection
against corrosion. Mixing G12evo with G13
(TL-VW 774 J), G12 plus-plus (TL-VW 774 G),
G12 plus (TL-VW 774 F), G12 (red) or G11
(green blue) engine coolants decreases pro-
tection again corrosion and should be avoi-
ded. WARNING
If there is not enough anti-freeze in the
cool ant syst

em, the engine may fail lead-
ing to serious damage.

Practical tips
Refilling coolant Fig. 227
In the engine compartment: marking
on cool ant e
xpansion tank. Fig. 228
Engine compartment: coolant expan-
sion t ank cap

. The coolant tank is located in the engine
compartment
››

› page 331
.
Top up coolant when the level is below the 
(minimum) mark. Checking coolant level

Checking and refilling levels
Brake fluid Check and r efill the br
ake fluidFig. 229
Engine compartment: brake fluid res-
erv oir cap

. The brake fluid reservoir is located in the en-
gine compartment
››

› page 331
.
Checking the brake fluid level
The brake fluid level must be between the 
and  markings.
However, if the brake fluid level goes down
noticeably in a short time, or drops below the mark, there may be a leak in the brake system. Seek specialist assistance. A warning
light on the instrument panel display monitors
the brake fluid level ››› page 89
.
In right-hand drive vehicles the brake fluid
reservoir is on the other side of the engine
compartment. Changing brake fluid
We r

ecommend that you have the brake fluid
changed by a Technical Service. WARNING
If the brake fluid level is low or unsuita-
bl e/ol

d brake fluid is used, the brake sys-
tem may fail or braking power may be re-
duced.

Practical tips
Check the water level in the windscreen
w asher r
eservoir regularly and top up as re-
quired.
The window washer tank contains liquid de-
tergent for the windscreen and rear window.

Checking and refilling levels

Fires, sparks, open flames and smoking are
pr
ohibit
ed.
 The battery should only be charged in a well-
v
entil

ated zone. Risk of explosion!
 Keep children away from acid and batteries!

Practical tips
WARNING
The 12 volt battery is a subject to wear. A
r eduction in batt
ery power can mean that
some important safety systems, such as
power steering, braking intervention, lights
or airbag systems, operate with limitations
or stop working entirely. This may cause
serious accidents and injuries. To avoid
this, it is necessary to take the following
safety measure:

Checking and refilling levels
Access to the 12 volt battery  V
alid for vehicles: plug-in hybrid (PHEV) Fig. 231
Location of the battery in the luggage
compartment Installation and removal of the 12-volt bat-
t
ery co
ver

Practical tips
Charging the battery
The v ehicl
e 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.
Replacing a vehicle battery
The 12-volt vehicle battery has been de-
signed to suit its location and has special
safety features. If you need to change the
battery, please go to a service centre before
buying a new one to get information about
the electromagnetic compatibility, size and
maintenance requirements, performance and
safety of your vehicle’s new battery. SEAT
recommends you have the battery replaced
by a technical service.
Start-Stop systems ( ››› page 224
) are equip-
ped with a special battery. Therefore, it must
only be replaced with a battery of the same
specifications.
Your vehicle is equipped with an intelligent
power management system to control the
distribution of electrical energy ››› page 344
.
The power management function ensures
that the battery is charged much more effi-
ciently than on vehicles without a power
management system. To maintain this func-
tion after replacing the battery, we recom-
mend that the replacement battery used is of
the same make and type as the original fitted battery. To make proper use of the power
management function after the batt
ery has
been changed, have the battery coded to the
power management mode at a specialised
workshop. WARNING