Seat Leon 5D Owner's Manual page 346

and when driving through corners, and
braking is also adversely affected.
The speed has to be adapted according-
●
ly, otherwise there is a risk of losing control
over the vehicle.
Wheel nuts
The wheel nuts are matched to the rims.
When installing different wheels (for instance
alloy wheels or wheels with winter tyres) it is
important to use the correct wheel nuts with
the right length and correctly shaped bolt
heads. This ensures that wheels are fitted se-
curely and that the brake system functions
correctly.
The wheel nuts must be clean and turn easily.
A special adapter is required to turn the anti-
›››
theft wheel nuts* page
WARNING
Wheel nuts should never be greased or
oiled.
Use only wheel nuts which belong to the
●
wheel.
If the prescribed torque of the wheel nuts
●
is too low, they could loosen whilst the ve-
hicle is in motion. Risk of accident! If the
1) COC = certificate of conformity.
344
tightening torque is too high, the wheel nuts
and threads can be damaged.
CAUTION
›››
See
ded tightening torque for wheel nuts for
steel and alloy rims.
Winter tyres
Winter tyres must be fitted on all four
–
wheels.
Only use winter tyres that are approved for
–
your vehicle.
Please note that the maximum permissible
–
speed for winter tyres may be lower than
for summer tyres.
Also note that winter tyres are no longer ef-
48.
–
fective when the tread is worn down.
After fitting the wheels you must always
–
check the tyre pressures. When doing so,
take into account the correct tyre pressures
listed on the rear of the front left door frame
›››
page
In winter road conditions winter tyres will con-
siderably improve vehicle handling. The de-
sign of summer tyres (width, rubber com-
Practical tips
page 51 to find out the recommen-
342.
pound, tread pattern) gives less grip on ice
and snow. This applies particularly to vehicles
equipped with wide section tyres or with
high speed tyres (code letters H, V or Y on
the sidewall).
Only use winter tyres of the correct type ap-
proved for your vehicle. The sizes of these
tyres are specified in the vehicle's documents
(e.g. EC Certificate of Conformity or COC
The vehicle documentation varies depending
on the country of residence.
Winter tyres lose a great deal of their proper-
ties when the tread is worn down to a depth
of 4 mm.
The performance of winter tyres is also se-
verely impaired by ageing, even if the tread is
still much deeper than 4 mm.
A code letter indicating the speed limit is
›››
stamped on all winter tyres page
Vehicles capable of exceeding these speeds
must have an appropriate sticker attached
so that it is visible to the driver. Suitable stick-
ers are available from the SEAT Official Serv-
ice and specialised workshop. Please note
the regulations to this effect in your country.
"All-weather" tyres can also be used instead
of winter tyres.
1)
).
340.