Japanese spec radio frequency conversion

I just bought a beautiful 735i but the radio frequency is in different range at my country. I read some forums here for the conversion( by holding down the 'Menu' button for ten seconds etc). The only problem for my car is I don't have a 'Menu' button. Can someone kind enough to share your thought. Thank you Bimmerfest.

If you are referring to the AM/FM frequency, you will need to have your ASK recoded.

There is an Idrive Service Menu which requires you to be at the Menu screen, then press down the knob for 6 seconds, release, then 3 turns rights, 3 turns left, 1 turn right, 1 turn left, 1 turn right, press down knob once. But I've only seen the ability to turn on / off the TV tuner diversity function. Nothing about radio frequency.