$2000.00 plus another 110 buck for sales tax is exactly what my dealer wanted in 2012 for navigation. Then map updates were something like 200 bucks that came on a 2Gb SD chip that also required a socket inside the console box.
So I said, no thank you.
Got a Garmin instead, talk about luck, my Target store was giving 50% off for just four hours when I walked in. Had both GPs and traffic, 5" screen, and lifetime free maps. Just updated the maps a couple of days ago.
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Since those suction cups only hold for two seconds, had a piece of 20 mil brass, could call this 0.5 mm, removed that cup, traced the base, left a long tab on the back, secured this to the bottom of the base with a flat head screw and covered it with felt. That AC outlet unsnaps, twisted the tab around it and snap the outlet back in, firm, doesn't rattle, and no mods to the car.
Removed the guts from the cigar plug, wrapped that in foam and hard wired it to the onstar fuse in the panel behind the fuse door. No cords dangling all over the place.
Also has a micro SD slot, got an Italy chip for 25 bucks, plugged that in, and worked perfectly in Italy. Try this with an OE navigational receive.
Wife wasn't very pleased at first they way I mounted it because she couldn't see. Ha, just replied, if you want to know if we are there yet, we still have 63 miles to go. But when she got behind the wheel, said I couldn't have picked a better spot.
We also have a couple extra thousand bucks in the bank.