Page 1 of 1 The McLaren Mercedes 2004 Formula One car, the MP4-19, made its track debut at the Valencia circuit in Spain with David Coulthard at the wheel. The design of the MP4-19 has required the incorporation of a number of new FIA Formula One technical regulations for the 2004 season. The single engine rule, which limits each driver to one engine per race weekend marks the most fundamental change. Consequently the Mercedes-Benz FO 110Q V10 is a completely new design, to meet the extended use requirements for the 2004 Formula One World Championship. The new engine is more compact than its predecessor, producing centre of gravity benefits. The Mercedes-Benz FO 110Q ran on the dyno for the first time on 31st July 2003. The revised regulations have also led to the MP4-19 carrying a rear wing restricted to a maximum of two horizontal elements, and an increased engine cover size. Other key visible design differences of the MP4-19 include the relocation of the radiator exit and a top exit exhaust. Page 1 of 1