Feature:Activate by OBD2 Plug and Play, Easy to use.Connect mobile phone with car only via cable.Support IOS Carplay and Android auto.(android auto only support car firmware version from 2016.9)Original Protocol Communication , not effect dealer warranty.For Mercedes NTG5.1 via OBD2If Android auto non applicate, push star button near menu roller. in second line press add application (+ icon). scroll the menu until find ''android auto''. click on it. now extra menu is on main menu optionUpdate newest software must with last version with Connect 5th Online Need online account and newest software DVD disk. Compatible models(COMAND NTG5S1):A-Class W176 Date of manufacture 12.2015+CLS-Class W218 Date of manufacture 01.2016+GLE-Class X166 Date of manufacture 01.2016+GLE Coupe W292 Date of manufacture 01.2016+GLE-Class W166 Date of manufacture 01.2016+GLA-Class W156 Date of manufacture 12.2015+CLA-Class W117 Date of manufacture 12.2015+E-Class W213 Date of manufacture 01.2016+B-Class W246 Date of manufacture 12.2015+C/GLC/S Series NTG5.0 and NTG5E are not support (Need to use video interface and iponoe box to achieve.)Please don't insert this OBD tool for unsupported models, or you need take all consequences. Many Thanks.(If your headunit is old version, the function will not normal work or can not be opened, you need update your hedunit to latest version online)Debugging Steps:Turn on the car ignition switchNTG5 S1 device connected to the car OBD interfaceCar display "DIAG" words, 10 seconds after the host restartRemove the OBD NTG5 S1 device. And then connect the phone (preferably using the original charging cable)End debugging,all is ok Package Included:1x Car Diagnostic ToolNote:Must ensure that the siri option of your phone is keep opening status.Android Auto is an app of the Android system, Android phone can use the Android Auto app.(But not all Android phone support Android Auto)Carplay is an app of IOS system, only phone can use the Carplay app.(Ip5 or Ip5 above are support)Must use original charging cable of your phone .