8.) Infiniti QX56 Blind Spot Warning System: $12,750
Some options are expensive just because they're expensive. Others obliterate your budget because they're sequestered in needless option packages. Reader ThunderSi explains how a blind spot warning system can cost $12,750.
I've mentioned it before, but the hands-down insanity is the blind-spot system on my wife's 2012 Infiniti QX56.
To get that system, which is basically a requirement in a rolling house like that, you have to get:
The Theater Package, for $2950
Required for Tire and Wheel Package, for $2300
Required for Deluxe Touring package, for $4500
Required for the Technology package, for an additional $3000
So, to get what's an a-la-carte option on the Mercedes GL class for a few hundred dollars, it required $12,750. Granted, that included is a bunch of other stuff, much of which, particularly in the Technology package, is annoying as all get-out.