I'm still debating whether to go with non-metallic or metallic window tint but before I make my decision I want to know what options I have for external navigation system antennas, how much they cost and how hard are they to install. Thanks.

 

go to www.terktechnologies.com they have a good selection and make great antennaes.

 

That URL didn't work but I went to www.terk.com and they had antennas but I didn't see anything specifically for GPS, only PCS and AMPS antennas. Will these work with the Nav system?

 

The best looking one that I've seen is the dorsal fin style on the new 745. Don't know the price but I'm sure you can get it from any BMW parts department.