Uniform Tire Quality Grading Standards
A uniform standard to grade the quality of tires with regards to tread quality, tire traction and temperature characteristics. Ratings are determined by tire manufacturers using U.S.
government testing procedures. The ratings are molded into the sidewall of the tire.
See also:
Important notes on tire pressure
WARNING
Should the tire pressure drop repeatedly:
- check the tire for foreign bodies.
- check whether the wheel is losing air or the
valve is leaking.
- make sure that only a valve cap approve ...
Switching on/off
The three blue indicator lamps in the buttons
indicate the ventilation level you have
selected.
If the battery voltage is too low, the seat
ventilation may switch off.
Make sure that the S ...
Hiding display messages
You can hide some display messages with a low priority.
Press the or
button on the steering wheel to
hide the display message. The display message is cleared.
Display messages with a hig ...