 Complete the following phrase:  The Renault era started in , with Italian Riccardo Patrese and Belgian Thierry Boutsen at the helm of the two Williams cars. Boutsen replaced Mansell, who had signed on to be Gerhard Bergers teammate at Ferrari. The engines first Grand Prix in Brazil was one that the team preferred to forget: Boutsen retired with an engine failure and Patrese with an alternator failure after leading, although Patrese did qualify second. The Williams Renault team managed to get back on track with Boutsen coming fourth in the next race at 