Originally Posted by Stephanie
Navi is around to $2000.00 mark when buying new from the dealer, thing is, if you don't have it, they cannot retrofit it later because its integrated into the dash design itself, which totally sucks.
It's not impossible, but it's a big job. If you find a wrecked E92, you can probably swap it in.
For bluetooth, I totally agree, it seems like such a insignificant thing, but once you have it, you cannot go back. I have it on my parent's ML, and I'm really considering it for the M5 now.