So far this seems to apply only to countries where MB offers the Drive Kit Plus, mainly Europe:
Drive Kit Plus availability plan including Drive App and SIRI
Model series Quarter Model
A-Class available W176
B-Class available W246
C-Class available W/S204
E-Class Q1/2013 W/S212, C/A207
CLS-Class Q1/2013 C/X218
S-Class Q1/2013 W/V221
SLK-Class Q1/2013 R172
GLK-Class Q1/2013 X204
Can be combined with the Audio 20 CD radio or COMAND Online. An App for Android is in preparation.
http://drive-kit-plus.com/en/#s/start
Navigation covers these countries at present:
Europe: Albania, Andorra, Austria, Belarus, Belgium, Bosnia-Herzegovina, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Macedonia, Monaco, Montenegro, Netherlands, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom, Vatican. North America: USA, Canada.