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:
Lights
Display messages about LEDs:
This display message will only appear if all LEDs have failed.
...
Child-proof locks
Important safety notes
WARNING
When children ride on the vehicle's rear seats,
activate the override switch. Otherwise, the
children could be injured, e.g. by trapping
themselves in the rear side ...
Setting the exterior lighting
Setting options
Exterior lighting can be set using:
• the light switch
• the combination switch
• the on-board computer
Light switch
Operation
If you hear a warning tone when ...