engine Seat Mii 2018 User Guide

Start and driving
Driving
St ar
t and driving
St
opping and starting the
engine
Switching on the ignition and start-
ing the engine Fig. 160
Vehicle key positions Read the additional information carefully

Start and driving
WARNING
Never switch off the engine while the vehi-
cle is mo ving. Y
ou may lose control of the
vehicle and there is a risk of serious acci-
dent.

Start and driving
the vehicle by braking individual wheels or by
r educing the engine t
or
que.
The ESC* has limits. It is important to realise
that ESC* is also subject to the laws of phys-
ics. ESC* will not be able to deal with all sit-
uations with which drivers may be faced. For
example, if the road surface changes sud-
denly then ESC* will not be useful in all ca-
ses. If the vehicle suddenly enters a section
covered by water, mud or snow then ESC*
will not provide assistance in the same way
as on dry ground. If the vehicle loses its grip
on the ground and moves on a film of water
(“aquaplaning”), the ESC* will not be able to
help the driver control the vehicle due to the
loss of adherence with the road surface pre-
venting braking and steering. If the vehicle is
driven through series of bends at high speed,
the ESC* will not always be as effective: ag-
gressive driving is not the same as slow driv-
ing.
Adjust your speed and driving style to suit vis-
ibility, and weather, road and traffic condi-
tions. ESC* cannot push the limits of the laws
of physics; improve the transmission available
or maintain the vehicle on the road if a lack of
driver attention creates an inevitable situa-
tion. Otherwise, ESC* assists in maintaining
vehicle control in extreme situations and uses
the movements of the steering made by the driver to maintain the vehicle moving in the
desired direction. If the v
ehicle is driven at
such a speed that it will leave the road before
ESC* can intervene then the system cannot
provide assistance.
The ABS, BAS, ASR and EDL systems are in-
corporated into the ESC*. The ESC* is al-
ways on 1)
.
Anti-lock system (ABS)
ABS can prevent the wheels from locking dur-
ing braking until just before the vehicle stops
thus helping the driver to steer the vehicle
and maintain control. This means that, even
during full braking, the risk of skidding is re-
duced:

Start and driving
Run-in and economical driv-
ing Running in Please observe the instructions for running-in
new components.
Running-in the engine
The engine needs t
o be run in o
ver the first
1,500 km. During its first few hours of running,
the internal friction in the engine is greater
than later on when all the moving parts have
bedded down.
How the vehicle is driven for the first 1,500 km
influences the future engine performance.
Throughout the life of the vehicle, it should be
driven at a moderate speed, especially when
the engine is cold, as this will reduce engine
wear and increase its useful life. Never drive
at extremely low engine speeds. Change
down to a lower gear when the engine no
longer runs “smoothly”. Up to 1,000 kilome-
tres the following instructions apply:

Driving
Economical and environmentally
friendly driving Fig. 165
Fuel consumption in litres per 100 km
at 2 diff erent outside t
emperaturesFuel consumption, environmental impact and
engine
, br
ak

e and tyre wear depend largely
on three factors:

Driving
WARNING
Always adapt your speed and the distance
to the v ehicl
es ahead in line with visibility,
weather conditions, the condition of the
road and the traffic situation. Engine management and ex-
haust gas purification sys-
tem
Intr oduction WARNING
The components of the exhaust system
reach v ery high t

emperatures. This could
cause a fire.

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