Using the mobile phone with Near Field Communication (NFC)
Requirements:
NFC is activated on the mobile phone (see the manufacturer's operating instructions)
The mobile phone's screen is switched on and unlocked (see the manufacturer's operating instructions)
Open the flap of stowage compartment 
above the media display.
above the media display. To connect a mobile phone:
hold the NFC area of the mobile phone (see manufacturer's operating instructions) on mat 
or place the mobile phone on it. To replace a mobile phone:
hold the NFC area of the mobile phone (see manufacturer's operating instructions) on mat or place the mobile phone on it. Follow the additional prompts on the media system display to replace the mobile phone in one or two phone mode More.
If required, confirm the prompts on your mobile phone (see the manufacturer's operating instructions).
If you want to charge a mobile phone without connecting it to the multimedia system, lay it on the mat without beforehand unblocking the screen.
Further information can be found at: Mercedes-Benz mobile Homepage