The Cadillac STS (Seville Touring Sedan) is a mid-sized luxury 4-door sedan manufactured and marketed by General Motors from 2004 to 2011 for the 2005 to 2011 model years. A version of the STS was sold in China as the SLS through 2013. It was equipped with a six-speed automatic transmission with performance algorithm shifting and driver shift control. Origins The STS was the successor to the Cadillac Seville, which beginning in 1987 was available as an upscale performance-oriented STS (for Seville Touring Sedan) version. While smaller than the full-size DTS, the more expensive STS was the flagship sedan of the Cadillac brand. Safety The Cadillac STS was rated with a four star frontal and five star rear passenger crash test rating from the National Highway Traffic Safety Administration. It was given an overall "Good" score in the Insurance Institute for Highway Safety frontal crash test and an "Acceptable" rating in the side impact test. In the side impact test injury measurements to the driver's pelvis was rated "Poor" and for the torso "Acceptable." 2005-2007 The front wheel drive Seville model name was retired in 2004, succeeded by an entirely new "STS" based on the rear wheel drive GM Sigma platform. The first Cadillac sedan to be offered with All wheel drive, it retained the Seville's high-performance Magnetic Ride Control suspension. The Cadillac STS was assembled at GM's Lansing Grand River facility in Lansing, Michigan along with the smaller CTS sedan. Available engines were a 3.6 L High Feature LY7 V6 with and and the 4.6 L Northstar LH2 V8 which puts out and in the STS. All engine models feature dual overhead camshafts with variable valve timing. Remote ignition is standard. Overall length was down 5" to 196.3", yet wheelbase grew by 4" to , resulting in increased interior space. A heads-up display was optional, as was a 300-watt Bose stereo system with MP3 capability. Base pricing at launch ranged from US$40,575 for the V6 model to US$47,025 for the V8. 2008-2011 The STS was updated for 2008. Changes included a refreshed exterior, with styling cues resembling the 2008 CTS, such as larger, more aggressive grille and chrome fender vents. The interior was updated, with new materials and a new steering wheel (like the one from the second-generation CTS), though the overall interior design remained the same, despite previous rumors of an all-new interior similar to that of the