I have ordered my X3 2 weeks ago and have a very long wait as I live in Queensland Australia. So while I have been waiting I have been reading many a forum and decided I would Retro Fit the Sat Nav instead of getting it factory fitted this is a huge cost saving. However while I was at the Brisbane car show today I asked the sales rep at the BMW stand what the cost would be for me to get them to Retro Fit Sat Nav. He advised that it would cost $18,000 AUD. He claimed I would have to replace the whole dash as it doesnt slip straight in like the X5. My Question is:

Has anyone retro fitted a 2007 X3 or even a late 2006 X3 and if so was it a major operation or somewhat easy? It would be great if someone from Australia has done it and if I could contact you to ask questions if I get stuck that would be great.

Thanks in advance

Shane