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you can buy a kit from BMW. It is not available in north america but you can find it on Ebay. Or if you have a contact overseas, you can buy it from there. If you are handy, you can do it yourself.
You need a kit, I can't recall the part number off the top of my head - but if you search the threads you will find it. It is OEM and I purchased it. I installed it myself actually I'm just waiting to get the software download (which you NEED to do). I have just been so busy that I have not had time. I installed it a month ago - just need the software download.
But the bottom line it is possible - you just need to be willing to spend some dough. Something like $1000 for parts and then potentially up to $300 to get the software.
If that sounds interesting, let me know and I will keep you posted. I'm finally planning to get the software download next week or the week after.
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