Tire tread
Summer tires
Do not drive with a tire tread depth of less than 0.12 in/3 mm.
There is an increased danger of hydroplaning if the tread depth is less than 0.12 in/3 mm.
Winter tires
Do not drive with a tire tread depth of less than 0.16 in/4 mm.
Below a tread depth of 0.16 in/4 mm, tires are less suitable for winter operation.
Minimum tread depth

Wear indicators are distributed around the tire's circumference and have the legally required minimum height of 0.063 in/1.6 mm.
They are marked on the side of the tire with TWI, Tread Wear Indicator.
See also:
Indicator lamps without text messages
The following indicator lamps notify you that
certain functions are active:
Symbol Function or system
Parking brake set
Canada: parking brake set
High beams/headlamp flasher
Front fog lamps ...
Radio
FM
AM
Weather Band
Satellite radio
Stored stations
...
Playing music
Music search
All tracks for which additional information has
been stored can be accessed by the music
search. Tracks without additional information
can be called up via the corresponding album. ...
