2006 Buick Lucerne CXL V6 4dr Sedan (3.8L 6cyl 4A)
An extremely smooth ride and very quiet, except for some limited engine noise on initial acceleration. Traded in 4 year old Crown Victoria to get a more comfortable ride for my bad back. The styling outside is quite modern looking, with only the rear end being slightly less attractive. On the first tank of gas with one-half in town and the other half on the highway it delivered 24.5 MPG, which is impressive for a 4,000 pound automobile. Have owned large GM cars since '72 and this one is better than my 1993 Bonneville (300K miles) or my 1998 Park Avenue that were both 3.8 liter V6's.
The gadgets, the steering wheel controls, the sound system, and the quiet ride are great. Nice improvement in gas mileage over the V8 Crown Victoria.
As others have said, a inside release for a locking gas cap.