his ATS into the wall. Just two laps later, on Lap three, de Cesaris limped into the pits with a broken driveshaft, leaving Rosberg in second place, three seconds behind Prost. On Lap seven, under pressure from de Angelis, Roberto Guerrero's Ensign went wide at the first corner. De Angelis tried to go through on the inside, but when Guerrero resumed his line, the two collided. The Lotus was able to continue, but Guerrero slid to a halt in the tire wall. Jochen Mass and Watson were able to avoid the disabled Ensign, but when Riccardo Patrese came upon the scene, he locked up and hit the tire wall right next to Guerrero, losing a wheel. A brake duct on Patrese's car quickly caught fire, and though the disabled cars seemed to be out of the way, the sight of two cars stopped on the track, one in flames, prompted the Clerk of the Course to call for the red flag. The cars returned to the pits and waited for nearly an hour, while all manner of repairs were made by the mechanics. Prost had his skirts changed and fuel topped off, Lauda changed his leaking oil cooler, and Guerrero, Winkelhock and Patrese, who had retired, even brought their spare cars out on the grid for the restart! This, at least, was not allowed, and eighteen cars restarted the race in running order, with the final result to be determined by the sum of the two times recorded in the two parts of the race. Prost again took the lead off the grid, and one lap later he led Rosberg, Pironi, Giacomelli, Cheever, René Arnoux, Lauda and Mansell. Immediately, Prost began to distance himself from Rosberg, who was also pulling away from Pironi and, after fifteen laps (total), led by five seconds. Gradually, however, the Renault began to develop electronic injection problems, as teammate Arnoux had several laps earlier, and the Frenchman saw his lead over Rosberg begin to evaporate. By Lap 21, the two cars were nose to tail, and a lap later, the Williams took the lead in brilliant fashion as Rosberg pulled alongside entering one of the many tight right-hand corners, stayed there through the corner on the outside, and emerged slightly sideways but in front. Prost continued to fall back and eventually pitted, while a furious dice continued behind Rosberg, now over second place, between Pironi,