Coordinated production between Setra and Mercedes-Benz started in 1997. New versions of the Citaro low-floor bus were presented that year, including a 15-metre three-axle version and an 18-metre articulated version. In 1998 the new Mercedes-Benz Tourismo (O350) was presented in a super-high-deck version with three-axles, based on the O404 coach chassis. The O404 integral bus was succeeded by the Travego in 1999. The Travego was available either with a six-cylinder in-line engine (initially delivering 354 and 408 hp) or with a V8 engine (delivering 476 hp).