Firmware upgrades to the Media Device Interface (MDI) are performed using the USB cable and a suitable USB storage device, the upgrade cannot be performed using the iPod/iPhone cable. Detailed instructions and possible error messages are detailed on the firmware version update pages.
Firmware Versions
MDI 0150 KW22-2011
MDI 0111 KW22-2010
MDI 0090 KW33-2009
General Notes (for all versions)
Only USB 2.0 hard drive and [...]
