Came across some useful information that I feel everyone can use.

Something this simple can help save lives.

Introducing Rescue AssistSM— the first-ever use of QR codes to help first responders react faster and more safely.

Rescue Assist℠ in your Mercedes-Benz:

• As of November 1, 2013, QR codes are installed in all Mercedes-Benz vehicles during production.
  
• Mercedes-Benz vehicles model years 1990 and newer can be retrofitted with the QR codes at any local dealership. There is no charge for this installation, and it does not have to be part of any service schedule.
  
• Visit your local Mercedes Benz Dealership for more information or to have this applied.

The link below contains more information

http://www.mbusa.com/mercedes/servic.../rescue_assist


Hope this is helpful.