2019 Seat Leon light

Driving
The area in front of and around the radar
sensor shoul d not be co
ver
ed with adhesiv
es,
additional or similar headlights, as this may
negatively affect Front Assist operation.
If the front of the vehicle is not properly re-
paired or structural modifications are made
to it, Front Assist operation may be affected.
SEAT recommends visiting a SEAT dealership
for this purpose. CAUTION
If you have the feeling that the radar sensor
is damaged or has lost its settings, discon-
nect the Front Assist. This will avoid possi-
bl e danger

ous situations caused by the in-
adequate operation of the system. If this
occurs have it adjusted.

Driver assistance systems
Overtaking
When the t urn signal lights up bef
ore the v
e-
hicl
e starts to overtake, the ACC accelerates
the vehicle automatically and thus reduces
the distance from the vehicle in front.
When the vehicle moves to the overtaking
lane, if the ACC does not detect another ve-
hicle in front, it accelerates until it reaches the
programmed speed.
System acceleration can be interrupted at
any time by pressing the brake or moving the
third lever to position 

Driving
Lane Assist with lane centring guide
The Lane Centring Guide function is inten-
ded t o keep the v
ehicl
e in the centre of the
lane.
If the driver has a tendency to veer slightly off
centre in the lane, the system adapts to driver
preferences.

Checking and refilling levels
Natural gas: “CNG” means Compr essed
N at ur
al
Gas.
Type of petrol  Valid for: vehicles with petrol engines
The correct grade of petr ol is list

ed inside the
fuel tank flap.
The vehicle is equipped with a catalytic con-
verter and must only be run on unleaded
petrol. The petrol must comply with the
standard EN 228 and be sulphur-free. Fuels
with a 10% ethanol ratio can be refuelled
(E10) 1)
. The types of petrol are differentiated
by using the octane numbers (RON) or via
the anti-knock index (AKI).
Super unleaded petrol 95 octane petrol or
normal 91 octane petrol at least
We recommend refuelling with super 95 oc-
tane petrol (91 AKI). If not available, normal 91
octane petrol (87 AKI) (with a slight power
loss) may be used.
Super unleaded petrol, 95 octanes at
least
You should use super 95 octane petrol (91
AKI) at least. 3 If super is not available, if necessary, use nor
-
mal 91 oct ane petrol (87 AKI). In this case only
use moder at

e engine speeds and a light
throttle. Refuel with super as soon as possi-
ble.
Unleaded super plus 98 octane petrol or
super 95 octane petrol at least
We recommend refuelling with super plus 98
octane petrol (93 AKI). If not available: super
95 octane petrol (91 AKI) (with a slight power
loss).
If super is not available, if necessary, use nor-
mal 91 octane petrol (87 AKI). In this case only
use moderate engine speeds and a light
throttle. Refuel with super as soon as possi-
ble. CAUTION

Practical tips
Control and warning lamps b
It lights up red
The engine cannot be restarted! The AdBlue level
is too l ow.
Stop the vehicle in a suitable, safe and flat area then
top up with the minimum required quantity of AdBlue

Practical tips

It lights up
Diesel engine preheating system.
The engine can be started straight aw ay when the
l
amp switches off. 
Flashes
Fault in the diesel engine management.
Have the engine checked as soon as possible by a
specialised w orkshop

.Note
While the control lamps , ;,  or  are
on, there might be faults in the engine, fuel consumption may go up and the engine
might l

ose power. Catalytic converter
To maintain the useful life of the catalytic
conv
er
ter

Practical tips

It lights up yellow
Check the engine oil level as soon as possible.
Replace oil as soon as you have the opport unit
y to
do so

Wheels
current they are using. This limits the amount
of po w
er consumed and helps t o ensur
e r
eli-
able starting even after a long period. Some
convenience functions, such as remote vehi-
cle opening, may not be available under cer-
tain circumstances. These functions will be
restored when you switch on the ignition and
start the engine.
With the engine switched off
For example, if you listen to the sound system
with the engine switched off the battery will
run down.
If the energy consumption means there is a
risk that the engine will not start, a text will
appear in vehicles with a driver information
system*.
This driver indicator tells you that you must
start the engine so that the battery can re-
charge.
When the engine is running
Although the alternator generates electrical
power, the battery can still become dis-
charged while the vehicle is being driven. This
can occur when a lot of power is being con-
sumed but only a small amount supplied, es-
pecially if the battery is not fully charged ini-
tially.
To restore the necessary energy balance, the
system will then temporarily shut off the elec-
trical devices that are using a lot of power, or reduce the current they are consuming. Heat-
ing systems in particular use a large amount
of el
ectrical power. If you notice, for instance,
that the seat heating* or the rear window
heater is not working, they may have been
temporarily switched off or regulated to a
lower heat output. These systems will be
available again as soon as sufficient electri-
cal power is available.
You may also notice that the engine runs at a
slightly faster idling speed when necessary.
This is quite normal, and no cause for con-
cern. The increased idling speed allows the
alternator to meet the greater power require-
ment and charge the battery at the same
time. Wheels
Wheel s and t
yres
Gener al not
es