Tire tread
 WARNING
 
WARNING
Although the applicable federal motor vehicle safety laws consider a tire to be worn when the tread wear indicators (TWI) become visible at approximately 1/16 in (1.6 mm), we recommend that you do not allow your tires to wear down to that level. As tread depth approaches 1/8 in (3 mm), the adhesion properties on a wet road are sharply reduced.
Depending upon the weather and/or road surface (conditions), the tire traction varies widely.
Do not use tires that are excessively worn as the tire traction on wet road surfaces decreases significantly when the tread depth is less than 1/8 inch (3 mm).
Tread wear indicators (TWI) are required by law. Six indicators are positioned on the tire tread. They become visible as soon as a tread depth of approximately 1/16 inch (1.6 mm) has been reached. If this is the case, the tire is so worn that it must be replaced.
The recommended tread depth for summer tires is at least 1/8 inch (3 mm). The recommended tread depth for winter tires is at least 1/6 inch (4 mm).

Bar marking 1 for tread wear is integrated into the tire tread.
See also:
Qualified specialist workshop
   An authorized Mercedes-Benz Center is a 
qualified specialist workshop. It has the 
necessary specialist knowledge, tools and 
qualifications to correctly carry out the work 
required on your vehi ...
   
Cleaning the seat covers
     Do not use microfiber cloths to clean
genuine leather, artificial leather or
Alcantara® covers. If used often, these can
damage the cover.
  Observe the following when cleaning:
• clean genuine ...
   
Canceling or continuing route guidance
   Canceling route guidance
 To activate navigation mode: press the 
 
function button once or twice.
 To show the menu: press  
the COMAND 
controller.
 Select Destination in the navigation 
sys ...
   
