Tire tread
WARNING
Although the applicable federal motor vehicle
safety laws consider a tire to be worn when
the tread wear indicators (TWI) become
visible at approximately 1/16 in (1.6 mm), we recommend that you do not allow
your tires
to wear down to that level. As tread depth
approaches 1/8 in (3 mm), the adhesion
properties on a wet road are sharply reduced.
Depending upon the weather and/or road
surface (conditions), the tire traction varies
widely.
Do not use tires that are excessively worn as the tire traction on wet road surfaces decreases significantly when the tread depth is less than 1/8 inch (3 mm).
Tread wear indicators (TWI) are required by law. Six indicators are positioned over the tire tread. They are visible as soon as a tread depth of approx. 1/16 inch (1.6 mm) is reached. If this is the case, the tire is so worn that it must be replaced.
The recommended tread depth for summer tires is at least 1/8 inch (3 mm). The recommended tread depth for winter tires is at least 1/6 inch (4 mm).

Bar marking 1 for tread wear is integrated into the tire tread.
See also:
Vehicle operation outside the USA and Canada
If you plan to operate your vehicle in foreign countries, please be aware that:
service facilities or replacement parts may not be readily available.
unleaded fuel for vehicles with a catalytic ...
Important safety notes
WARNING
Gasoline and diesel fuels are highly flammable
and poisonous. They burn violently and can
cause serious injury.
Never allow sparks, flames or smoking
materials near gasoline or diesel ...
EBD (electronic brake force
distribution)
Observe the "Important safety notes"
section
EBD monitors and controls the brake
pressure on the rear wheels to improve
driving stability while braking.
WARNING
If EBD has malfu ...
