engine Seat Leon 2019 Owner's Guide

Practical tips
Ethanol fuel  Valid for: vehicles with Totalflex engines
You can recognise v ehicl
es with Totalflex en-
gines 1)
by label on the fuel tank lid with with
the marking “Petrol/ethanol”.
Vehicles with Totalflex engine can run with
unleaded petrol (95 octane / 91 AKI) accord-
ing to ANP No. 57 and with fuels with any high
percentage of ethanol. The vehicle is refuel-
led in the same way as petrol refuelling.
Also consider that

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

Checking and refilling levels
Regeneration of the petrol (except the TSI
2. 0l engine) and diesel par
ticulat
e filt
er
Requirements for the regeneration journey:
the engine is at operating temperature.

Practical tips
Checking levels Fig. 316
Diagram for the location of the various el-
ements. From time to time, the levels of the different
fluids in the v
ehicl
e must be check ed. Ne
v
er
fill with incorrect fluids, otherwise serious
damage to the engine may be caused.
Coolant expansion tank

Checking and refilling levels
Petrol engines: st andar
d VW 504 00,
VW 502 00, VW 508 00, ACEA C3 or
API SN.
Diesel engines: st
andar
d VW 507 00,
VW 505 01, ACEA C3 or API CK-4.
Have the oil changed by a specialised work-
shop.
Using engine oil that is compliant with the VW
504 00 standard instead of VW 508 00
could increase consumption and the vehicle

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

Practical tips
Cooling system Cool ant specifications The engine cooling system is supplied from
the factory with a specially treat
ed mixt
ure of
water and at least 40 % of the additive
G12evo (TL-VW 774 J), purple. This mixture
gives the necessary frost protection down to
-25

Practical tips
soon as the ignition is switched on and the
engine st art
ed.
Wint er conditions
During the wint er
, the starting power may be
reduced, and if necessary, the battery should
be charged

Practical tips
disposed of appropriately and must not be
disposed of with ordinary household wast
e
.Energy management
Optimisation of the starting ca-pacity The power management controls the distri-
bution of electrical energy and thus helps to
ensur
e that ther

e is always enough power
available to start the engine.
If a vehicle with a conventional electrical sys-
tem is left parked for a long time, the battery
will gradually lose its charge because certain
electrical devices, such as the electronic
gearbox lock continues to draw current even
when the ignition is off. In some cases there
may not be enough power available to start
the engine.
Your vehicle is equipped with an intelligent
power management system to control the
distribution of electrical energy. This signifi-
cantly improves reliability when starting the
engine, and also prolongs the useful life of the
battery.
The main functions incorporated in the power
management system are battery diagnosis,
residual current management and dynam-
ic power management. Battery diagnosis
The battery diagnosis function constantly
regist ers the condition of the batt

ery. Sensors
detect the battery voltage, battery current
and battery temperature. This enables the
system to calculate the current power level
and charge condition of the battery.
Residual current management
The residual current management reduces
power consumption while the vehicle is
parked. It controls the supply of power to the
various electrical devices while the ignition is
switched off. The system takes the battery di-
agnosis data into consideration.
Depending on the power level of the battery,
switch off the individual electrical devices
one after the other to prevent the battery
from losing too much charge and to ensure
that the engine can be started reliably.
Dynamic power management
While the vehicle is moving, this function dis-
tributes the available power to the various
electrical devices and systems according to
their requirements. The power management
ensures that on-board systems do not con-
sume more electrical power than the alterna-
tor can supply, and thus maintains the maxi-
mum possible battery power level. Note