Volvo XC90: Wheels and tires / Tread wear indicator
The tread wear indicator shows the status of the tire's tread.

The tread wear indicator is a narrow elevated strip running across the tire's
longitudinal tread grooves. The letters TWI (Tread Wear Indicator) are visible on
the side of the tire. When approximately 1.6 mm (1/16 inch) is left on the tread,
the tread will be at the same height as the tread wear indicator. Replace the tire
as soon as possible. Tires with low tread offer very poor traction in rain or snow.
Tires with tread designed to roll in only one direction are marked with an
arrow on the sidewall.
The arrow shows the tire's direction of rotation.
The tire should maintain the same direction of rotation throughout its service
life...
The following is a glossary of tire-related terms.
The tire suppliers may have additional markings, notes or warnings such as standard
load, radial tubeless, etc...
Other information:
(Option/accessory.)
Drive modes affect the vehicle's driving characteristics in different ways
to enhance and simplify the driving experience in certain types of situations.
Drive modes enable easy access to the vehicle's many functions and settings in
different driving situations...
The fuel gauge in the instrument panel shows the fuel level in the tank.
The illustration is generic - details may vary according to
vehicle model.
Fuel gauge in 12" instrument panel:
The beige area in the fuel gauge indicates the amount of fuel left in the tank...