2006 Cadillac DTS Performance 4dr Sedan (4.6L 8cyl 4A)
I started owning Cadillacs in 2000 and loved the exterior design of the DTS models from 2000-2005. I bought a 2006 in anticipation that it would be better, however in my opinion it is worse. It has very shallow cup holders. I have spilled several cups of coffee since owning the car due to this issue. It also is a bit noisy during hard acceleration, but the cruising noise level is fine. It has some torque steer at highway speed when you floor it because it is front wheel drive, which I find annoying. The OnStar system is excellent and the fact that you can use your Verizon cell phone numbers with it is a nice feature.
OnStar, navigation, and the overall comfort.
Fix the mediocre exterior styling. The badge on the grill is too big. Get rid of the transverse engine and go to all wheel drive. Create another level of Cadillac and compete with Mercedes-Benz.