Seat belts
Head-on collisions and the laws of
physics Fig. 7
A driver not wearing a seat belt is
thrown forward violently Fig. 8
The unbelted passenger in the rear
seat is thrown forward violently, hitting the
driver wearing a seat belt It is easy to explain how the laws of physics
work in the case of a head-on collision: when
a vehicle starts moving, a type of energy called “kinetic energy” is created both in the
passengers and inside the vehicle.
The amount of “kinetic energy” depends on
the speed of the vehicle and the weight of
the vehicle and its passengers. The higher
the speed and the greater the weight, the
more energy there is to be “absorbed” in an
accident.
The most significant factor, however, is the
speed of the vehicle. If the speed doubles
from 25 km/h (15 mph) to 50 km/h
(30 mph), for example, the corresponding ki-
netic energy is multiplied by four.
Because the vehicle occupants in our exam-
ple are not restrained by seat belts, in the
event of crashing against a wall, all of the oc-
cupants' kinetic energy will be absorbed
solely by said impact.
Even at speeds of 30 km/h (19 mph) to
50 km/h (30 mph), the forces acting on bod-
ies in a collision can easily exceed one tonne
(1000 kg). At greater speed these forces are
even higher.
Vehicle occupants not wearing seat belts are
not “attached” to the vehicle. In a head-on
collision, they will move forward at the same
speed their vehicle was travelling just before
the impact. This example applies not only to
head-on collisions, but to all accidents and
collisions.
Even at low speeds the forces acting on the
body in a collision are so great that it is not
possible to brace oneself with one's hands.
In a frontal collision, unbelted passengers
are thrown forward and will make violent con-
tact with the steering wheel, dash panel,
windscreen or whatever else is in the way
››› Fig. 7 .
It i
s also important for rear passengers to
wear seat belts properly, as they could other-
wise be thrown forward violently through the
vehicle interior in an accident. Passengers in
the rear seats who do not use seat belts en-
danger not only themselves but also the front
occupants ››› Fig. 8.
13Technical specifications
Advice
Operation
Safety
Advice
Replacing tyres and wheels All four wheels must be fitted only with tyres
of the same type, size and the same tread
pattern.
The correct tyre/wheel combinations speci-
fied for your vehicle are listed in its docu-
mentation.
Note for Italy: A SEAT Service Centre should
be c
on
sulted whether different sized wheels
or tyres to those originally fitted by SEAT may
be fitted, as well as the combinations al-
lowed between the front axle (axle 1) and
back axle (axle 2).
Understanding the tyre designations makes
it easier to choose the correct tyres. The tyre
designation is marked on the sidewall. For
example.
195/55 R 15 85 H
This contains the following information:
195Tyre width in mm
55Height/width ratio in %
Ridentifying tyre construction letter –
Radial
15Rim diameter in inches
85Load rating code
HSpeed rating code letter The tyres are subject to the following
maxi-
mum speed limits :
Speed rating code
letterMaximum speed limit
Q160 km/h (99 mph)
R170 km/h (106 mph)
S180 km/h (112 mph)
T190 km/h (118 mph)
U200 km/h (124 mph)
H210 km/h (130 mph)
V240 km/h (149 mph)
W270 km/h (168 mph) The
manufacturing date
is also indicated on
the ty
re sidewall (possibly only on the inner
side of the wheel).
DOT … 27 12…
means, for example, that the tyre was pro-
duced in the 27th week of 2012.
Follow the instructions ››› page 146 if you
only have a temporary spare wheel.
Tyres with directional tread pattern The direction of rotation is indicated by the
arrows on the tyre sidewall
. The direction ofrotation indicated must be respected. This
guarantees optimum grip and helps avoid ex-
cessive noise, wear and aquaplaning.
In the event of a flat tyre, a spare wheel with
an undetermined tread pattern or an oppo-
site tread pattern must be used and you must
drive carefully, as in these cases the tyres no
longer offer maximum performance.
Spare wheel Spare wheel location* Fig. 119
Luggage compartment: spare wheel. The spare wheel is housed in a well under
the floor panel in the luggage compartment
and is secured by a special bolt
››› Fig. 119 .
T ak
e out the tool box before removing the
spare wheel.
146
Advice
● The temporary spare wheel is fitted
● One wheel on the axle has been changed
Basic system settings
Should the tyre pressure change or if one or
more wheels are changed or the position of
the wheel on the vehicle is changed, e.g.
changing round the front and rear wheels, or
where a warning lamp lights up when driv-
ing, the system must be adjusted as follows:
● Inflate all tyres to the prescribed pressures
››› page 144 .
● Sw it
ch the ignition on.
● Hold the
››› Fig. 120 button down for
at least 2 seconds. The warning lamp will
light up when the button is pressed . The
system memory is also deleted and a new
calibration process will begin, which is indi-
cated by an audible warning and the warning
lamp switching off.
● If the warning lamp remains lit and does
not switch off, not even once the basic set-
ting process is complete, this indicates a
fault in the system. Contact an Official Serv-
ice.
The warning lamp lights up
If the pressure on at least one tyre is signifi-
cantly lower than the pressure set by the driv-
er, the warning lamp ››› will light up.The warning lamp flashes
If the warning lamp flashes, there is a fault in
the system. Contact a specialised service to
have it fixed.
WARNING
● If the warning lamp lights up, slow down
immediately and avoid any severe braking or
steering manoeuvres. Stop and check the
tyres and their pressure as soon as possible.
● Under certain conditions (e.g. sporty driv-
ing style, driving on loose surfaces or in win-
ter) the warning lamp may take a while to
light up or m
ay remain switched off.
● Despite the tyre pressure monitoring sys-
tem, the driver remains responsible for main-
taining the correct tyre pressure. You must
therefore check the tyre pressure often. Note
● The tyre pressure monitoring system is not
a replacement for regularly checking the tyre
pressure, as it is unable to recognise an even
drop in pressure.
● The tyre pressure monitoring system is un-
able to warn of a sudden drop in tyre pres-
sure, e.g. a puncture. In this case, try to stop
the vehicle carefully with no severe braking
or steering manoeuvres.
● To ensure the tyre pressure monitoring sys-
tem works correctly, the basic setting must
be performed every 10 000 km (6000 miles)
or once a year. Winter service
Winter tyres Winter tyres will significantly improve han-
dling of the vehicle in winter road conditions.
The design of summer tyres (width, rubber
compound, tread pattern) gives less grip at
temperatures below +7 °C (45 °F), on ice and
snow. This applies particularly to vehicles
equipped with wide section tyres or high
s
peed ty
res (code letters H or V on the side-
wall).
In order to preserve the performance of the
vehicle as much as possible, winter tyres
must be fitted on all four wheels, the mini-
mum depth of the tread must be 4 mm and
the maximum age must be 4 years.
You can use winter tyres of a lower speed rat-
ing if the maximum speed limit of these tyres
will not be exceeded, even if the maximum
speed limit for the vehicle is higher. For the sake of the environment
Summer tyres should be fitted again in time,
as they give better handling on roads free of
snow and ice and at temperatures over +7 °C
(45 °F). Summer tyres have a shorter braking
distance, produce less rolling noise and do
not wear as quickly. They also reduce fuel
consumption. 148