The W140 made its public debut at the Geneva Motor Show in March 1991. It cost Mercedes-Benz ablmost $1billion in research and development. A large amount of innovation was built into it. The W140 was also the first production car that had double glazed glass for the windows and power assisted closing for the doors and boot lid. Everything in the car felt good to the touch and also felt like it could last forever. At the end of it’s production run in September 1998, Mercedes-Benz built a total of 406,532 W140 sedans and 26,022 coupes in the eight year production run.