I know this is an old thread but thought it would be useful to let people know I have managed to retrofit the same radio (9246503) into my 2009 E89 Z4. I used the E89 DAB antenna (9123995) which connects to the radio via a fakra cable. The 318 Touring would use a different antenna and amplifier on the right side rear window but you might be able to use a window antenna.
In terms of coding you might need to add 654 to the coding on the CAS and FRM modules to enable DAB if it isn't already enabled.
Professional radio CD updates Bluetooth and DAB
in BMW 3 Series Forum
Posted
I know this is an old thread but thought it would be useful to let people know I have managed to retrofit the same radio (9246503) into my 2009 E89 Z4. I used the E89 DAB antenna (9123995) which connects to the radio via a fakra cable. The 318 Touring would use a different antenna and amplifier on the right side rear window but you might be able to use a window antenna.
In terms of coding you might need to add 654 to the coding on the CAS and FRM modules to enable DAB if it isn't already enabled.
I hope that helps someone
Thanks,
Nick