hello my 2008 bmw 335i has developed a problem on the usb connector. i bought a bmw cable to connect my ipod to the car through the usb it worked initially then it would not register on the incar screen. i took it back to bmw they replaced the cable it then worked for a week or so but now i have the same problem, is this a common fault? the headphone socket next to the usb is working
any suggestions please