2018 Seat Mii engine

Driving
Driver assistance systems
St ar
t
-Stop system
Control lamps 
It lights up
The Start-Stop system is enabled. 
Flashes
The Start-stop system is not available.
Go to a specialised w orkshop

.i
It lights up
The Start-Stop system is enabled but the engine
cannot be automatically st opped.
Go t

o a specialised workshop. 
It lights up
The Start-stop system cannot start the engine.
Start the v ehicl

e manually with the key

Practical tips
Checking and refilling lev-
el s
Fuel Identification of the fuel 1)Fig. 176
Identification of fuels according to Eu-
r opean Union (EU) Dir
ectiv
e 2014/94/Fuels are identified with different symbols.
Depending on the fuel, the diff
erent symbol

s
are on the pump and the tank lid of your vehi-
cle. The identification serves to prevent con-
fusion when choosing the fuel.
Petrol with ethanol (“E” stands for Etha-
nol). The number indicates the percent-
1 age of ethanol in the petrol. “E5” means,
f
or e
x

ample, an ethanol ratio of 5% max.
Diesel with biodiesel (“B” stands for Bio-
diesel). The number indicates the per-
centage of biodiesel in the diesel. “B7”
means, for example, a proportion of bio-
diesel of max. 7%.
Natural gas: “CNG” means Compressed
Natural Gas.
Type of petrol  Applies to v
ehicl
es: with petrol engine
The correct grade of petrol is listed 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) 2)
. The types of petrol are differentiated
by using the octane numbers (RON) or via
the anti-knock index (AKI).
The following pieces of text show the infor-
mation included in the corresponding stickers
on the tank lid (examples): 2 3 Super unleaded petrol 95 octane petrol or
normal 91 oct
ane petr
ol at l

east
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).
Super unleaded petrol, 95 octanes at
least
You should use super 95 octane petrol (91
AKI) at least.
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.
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 1)
Depending on country
2) Follow the regulations of the country you are
driving in.
186

Practical tips
However, the heating power and the propor-
tion of nitr ogen and carbon dio
xide can fluc-
t
uate within the quality groups. Therefore, ve-
hicle consumption can also vary when using
a single type of gas only.
The engine management automatically
adapts to the natural gas used according to
its quality. Therefore, different quality gases
can be mixed in the tank, without the need for
comprehensive draining before applying a
different quality gas.
Natural gas and safety
If you can smell gas or suspect that there is a
leak

Practical tips
Refuelling with natural gas Fig. 180
Open tank lid: gas filler mouth 1 , fill-
er mouth r et
ainer 2 Before r
efuelling, the engine and the ignition,
mobil e t
elephone and heating must be
switched off separately

Checking and refilling levels
Bonnet W orking in the engine compar
t
-
ment Read the additional information carefully

Checking and refilling levels
For the sake of the environment
The oil level must never be above zone A .
Otherwise oil can be drawn in thr ough the
cr
ankcase breather and leak into the at-
mosphere via the exhaust system. Engine oil consumption
The consumption of engine oil can be differ-
ent from one engine t
o another and can v

ary
during the useful life of the engine.
Depending on how you drive and the condi-
tions in which the vehicle is used, oil con-
sumption can be up to 1 ltr./2000 km. In the
case of new vehicles, the consumption can
exceed this figure over 5,000 kilometres. For
this reason the engine oil level must be
checked at regular intervals, preferably when
filling the tank and before a journey.
When the engine is working hard, for instance
during sustained high-speed motorway cruis-
ing in summer or when climbing mountain
passes, the oil level should preferably be kept
within area

Practical tips
Engine coolant Intr oduction WARNING
Engine coolant is toxic!

Checking and refilling levels
Checking the coolant level and
t opping up Fig. 183
In the engine compartment: Marking
on cool ant expansion t
ankFig. 184
In the engine compartment: Coolant
e xpansion t ank cap Read the additional information carefully