$185 is not too bad compared to others. Not that I think that $185 is worth it, but the upgrade DVD for the Acura TL is $350 and the Infinity QX45 $475, just for comparison.

2008 Honda Civic Hybrid w/Navi, Magnetic Pearl
1996 Acura NSX-T Red\Tan
2002 Dodge Ram 1500 Quad Cab