Descended from the long-lived DeVille,the front-wheel-drive DTS luxury sedan debuted for the 2006 model year without dramatic change in appearance or powertrain. Cadillac's Northstar 4.6-liter V8 engine is offered in a choice of two power configurations. Only a single trim level is available,but several option packages may be added at extra cost. Six airbags are standard,including an ""industry first"" dual-depth front-passenger airbag. For nearly two decades,the DeVille accounted for almost half of Cadillac sales. Its successor,the DTS,might lack a vibrant personality,yet it continues to exude a certain appeal?especially for the,shall we say,more seasoned customers.