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WHEELS AND TYRES
506
Tread wear indicators on the tyres
Tread wear indicators show the status of the
tyre's tread depth.
A tread wear indicator is a narrow elevation
across the longitudinal grooves of the tyre's tread
pattern. On the side of the tyre are the letters
TWI (Tread Wear Indicator). When the tyre's tread
depth is down to 1.6 mm (1/16"), the tread will
be level in height with the tread wear indicators.
Change to new tyres as soon as possible.
Remember that tyres with little tread depth pro-
vide very poor grip in rain and snow.
Related information
•
Tyres (p. 504)
Checking the tyre pressures
Tyres with the correct air pressure increase driv-
ing safety, save fuel and extend the service life of
the tyres.
Tyre pressure decreases over time, this is a natu-
ral phenomenon. Tyre pressure also varies
depending on ambient temperature. Inadequate
tyre pressure increases fuel consumption, short-
ens tyre lifespan and impairs the car's driving
characteristics. Driving on tyres with tyre pressure
that is too low could result in the tyres overheat-
ing and being damaged. Tyre pressure affects
travelling comfort, road noise and driving charac-
teristics.
Recommended tyre pressure
The tyre pressure label on the driver's side door
pillar (between frame and rear door) shows which
pressures the tyres should have at different loads
and speed conditions.
Improved fuel economy with ECO pressure
For a light load (max. 3 people) and a speed of
up to 160 km/h (100 mph), the ECO pressures
can be chosen for optimum fuel economy. How-
ever, the lower comfort pressures are recom-
mended instead if optimum noise and travelling
comfort are desired.
Checking the air pressure
1. Check the tyre pressures monthly. Carry out
the check on cold tyres, which means that
the tyres should have the same temperature
as the outside temperature. After several few
kilometres of driving, the tyres warm up and
the pressure increases.
2. If necessary, inflate so that the air pressure
corresponds with the approved tyre pressure
in accordance with the tyre pressure label.
NOTE
•
After a tyre has been inflated, always refit
the dust cap in order to avoid damage to
the valve from gravel, dirt, etc.
•
Only use plastic dust caps. Metal dust
caps can rust and become difficult to
unscrew.
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