2019 Seat Leon Owner's manual

Checking and refilling levels
comprehensive draining before applying a
diff er
ent qualit y gas.
Updat ed inf
ormation relating to natural gas
quality is displayed on the instrument panel

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

Checking and refilling levels

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
start up automatically, and therefore there
is a risk of injury.

Checking and refilling levels
Opening the bonnet
The bonnet is r el
eased fr om inside the v
ehi-
cl
e.
Before opening the bonnet, make sure that
the windscreen wiper arms are in place
against the windscreen.

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