2014CL600

Should I buy an I phone 6 for my car or buy the new MOTO X2 that can be customized to say Mercedes-Benz when it comes on and the back is wood with the words Mercedes-Benz on the back. Only issue I am concerned with is it will not show up in the head unit, I do not think, unless I get a Bluetooth unit for the I connectivity cable or plug in a Bluetooth into the USB connection. Does anyone know for sure? I have 2 days left on the sale for the Motor X2 or do I suck it up and pay 1K for the I phone?