See also:

Treadwear indicators
Narrow bars (tread wear bars) that are distributed over the tire tread. If the tire tread is level with the bars, the wear limit of 1/16 in (1.6 mm) has been reached. ...

Hazard warning lamps
The hazard warning lamps automatically switch on if: an air bag is deployed. the vehicle is slowed down severely from a speed of over 45 mph(70 km/h) and comes to a halt. To switch on the ...

Important safety notes
See the "Important safety notes" section If ESP® detects that the vehicle is deviating from the direction desired by the driver, one or more wheels are braked to stabilize the vehicle ...