klchong73... I think that this topic has been covered before. You just have to browse through the threads in this forum
anyway, a brief answer to your question...
Like you, I have E60 Japan specs... however, if you want to install Navigator into your car there are 2 options...
1) change your car's CCC from Japan spec to MY/UK specs so that you can utilise the Navigation system in your E60
2) Install interface to your E60 and then install third party GPS such as Garmin into your car...
please GOOGLE "Obermaier Motorsport"
They are located in Jalan Ipoh... person in charge is Freddy :top: you should be able to find their contact details ie. address and telephone number on their website!
P.S: Price indication is less than 10k depending on what you want to install... good luck