the psychological advantage of having set the fastest time at the final pre-season testing session at the Autódromo do Estoril, 0.35 seconds faster than Schumacher's best around the circuit. The Williams team had also completed 2,500 miles of testing with its FW17 chassis, significantly more than Benetton; the team had encountered some reliability problems with its own B195 chassis. Heading into the new season, attention also focused on the McLaren team and its driver Nigel Mansell. He was initially announced as the partner of Mika Häkkinen; however, a week before the first race, McLaren announced that Mansell would not compete in the first two races of the new season, as he could not fit into the MP4/10 car. Mansell's arrival at McLaren was due to demand from the team's sponsors, including Philip Morris, whose brand, Marlboro, was on the car, who wanted to enjoy the publicity associated with the World Champion's return even if it meant him performing worse than teammate Häkkinen. His place at McLaren for the first two races was taken by the team's test driver, Mark Blundell, as McLaren worked to build a wider monocoque to accommodate Mansell. McLaren were also concerned about the standard refuelling equipment provided for 1995 by suppliers Intertechnique, having suffered a major leak in a test of the new rig outside of its factory. Intertechnique had redesigned the fuel equipment, which was used by all of the teams, in the wake of a pit lane fire suffered by driver Jos Verstappen during the previous year's . The new fuel rigs, in addition to being half the size of the 1994, also featured longer nozzles, and were designed to lock onto the car before any fuel could begin to flow. Intertechnique traced the problem to a faulty valve within the equipment, which caused of fuel to leak, and modified the parts accordingly. Intertechnique and the FIA advised the teams to refuel the cars slowly and carefully during pitstops to avoid any further leaks, a situation that was considered unsatisfactory by many of the team principals and mechanics. A new regulation for 1995 also mandated the teams' fuel suppliers to send samples of their fuel to the FIA prior to each Grand Prix, which the governing body would use as a reference when conducting fuel tests at the event itself. Thus only fuel approved by the FIA in advance was allowed; any deviations from