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:
The vehicle recovers kinetic energy during braking in order to reduce fuel
consumption and emissions.
The battery symbol is shown in
the instrument panel when the vehicle is generating power for the battery1.
The function is available in all drive modes together with gear selector position
D or M...
The temperature can be set to the desired number of degrees for the rear seat
climate zones.
Setting the temperature for the rear seats from the front seats
Tap the symbol in the center
of the climate bar to open Climate view in the center display...