with two turbochargers. The S 65 had four oval tail-pipes and AMG alloy wheels. Specific versions One of the most popular versions was the long-wheelbase S 500, with over 108,000 produced over the model run. On top of that, an additional over 13,000 all-wheel drive S 500 version were made and over 21,000 short-wheel base S 500 models. This works out to about 140,000 S 500 of all versions across all model years out of 484,683 of all W220 models over its production run. The W220's peak sales year was 2000, with 88,000 sold worldwide, but both 1999 and 2001 were close with well over 80,000 sold. Two unique models that had small runs were a factory produced 160 inch wheelbase "stretch limo" called a Pullman and a special security version called S-Guard. The Pullman version was a Mercedes-Benz engineered version of the S-Class of this period (circa 2001), that went beyond the after market "stretch" to offer a host of advanced systems and enhanced comfort. One of those systems was the AMG Advanced Mobile Media System to support the concept of a mobile office from within the vehicle. Components of this system including 10.4 inch LCD monitors displaying data from a computer with mobile web access. The system could also support video display, both from a DVD player or tuner to pick up broadcast; with two screen, it could display both at the same time. An additional re-chargeable battery allowed the system to powered independently for a half-hour with the engine off. The AMG developed media system could connect to the World Wide Web using HSCSD or GPRS at up to 43 kilobits per second. The AMG Advanced Mobile Media System debuted in 1999 on the Mercedes-Benz S 55 AMG, which was noted for featuring a six-channel digital audio system. The system debuted on S-Class with 2001 Pullman model. AMG signed a cooperation agreement with Daimler-Benz starting 1990, producing special models of MB vehicles and became further integrated in this period starting in 1991 with the foundation of Mercedes-AMG GmbH various changes driven especially by the success of AMG models in MB lines and expansions at Affalterbach, Germany. The S-Class Pullman was offered as the S 500 (V8) or S 600 (V12) and was jointly developed by Mercedes and AMG. The Pullman is longer than the regular S-Class, providing of space in the rear seat area. This also additional