Carmakers may have finally reached their sport-utility size limit with the Unimog. DaimlerChrysler's Freightliner division now says it will only sell the behemoth in North America as a commercial vehicle and that the Unimog is not intended to compete in the SUV mass market. But that policy follows a speech in which Freightliner CEO Jim Hebe touted the retail market for the Unimog. The idea of a 6-ton SUV raised the hackles of opponents including the Sierra Club. Freightliner's latest plan is to sell the German-built Unimog under the Freightliner Trucks commercial truck and American LaFrance fire truck brands. It expects to sell about 300 Unimogs in the U.S. in its debut year of 2002.