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)
It is possible to use a mobile phone via NFC with Bluetooth® telephony.
To connect a mobile phone:
open stowage compartment cover 
. Place the NFC area of the mobile phone (see manufacturer's operating instructions) on NFC logo 
on the inside of the cover.
on the inside of the cover. The mobile phone is connected to the multimedia system.
To change mobile phones:
place the NFC area of the mobile phone (see manufacturer's operating instructions) on NFC logo . If the mobile phone has already been authorised on the multimedia system, it is now connected.
If the mobile phone is authorised on the multimedia system for the first time, it is connected after confirming the mobile phone instructions (see the manufacturer's operating instructions).
Further information can be found at: Mercedes-Benz mobile Homepage