Tire tread
WARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk of hydroplaning increases, in particular where speed is not adapted to suit the driving conditions. There is a risk of accident.
If the tire pressure is too high or too low, tires may exhibit different levels of wear at different locations on the tire tread. Thus, you should regularly check the tread depth and the condition of the tread across the entire width of all tires.
Minimum tire tread depth for:
• Summer tires: 
in (3 mm)
• M+S tires: 
in (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached.
Bar indicator 1 for tread wear is integrated into the tire tread.
Treadwear indicators (TWI) are required by
law. Six indicators are positioned on the tire
tread. They are visible once the tread depth
is approximately 
in (1.6 mm). If
this is the
case, the tire is so worn that it must be
replaced.
See also:
Crash-responsive emergency lighting
The interior lighting is activated automatically
if the vehicle is involved in an accident.
■ To switch off the crash-responsive
emergency lighting: press the hazard
warning lamp button.
or ...
Tire pressure specifications
Important safety notes
WARNING
Underinflated or overinflated tires pose the
following risks:
• the tires may burst, especially as the load
and vehicle speed increase.
• the tires may wear excess ...
Important safety notes
WARNING
If you operate information systems and
communication equipment integrated in the
vehicle while driving, you will be distracted
from traffic conditions. You could also lose
control of the ...