that occasion, it took several hours after the race to figure out the winner and final results since the safety car driver had placed his car in front of the wrong competitor thus causing part of the field to be one lap down incorrectly. The sport officially introduced safety cars in , after trials were conducted at both the French and British Grands Prix during the preceding season. Since , as part of promotional arrangements, the main supplier of safety cars has been Mercedes-Benz, with Aston Martin sharing the duties with them from , unlike previous years that have seen cars of different brands being used throughout the season and depending on the track visited (for example, the exotic Lamborghini Countach for the Monaco Grand Prix in the 1980s and the Lamborghini Diablo for the 1995 Canadian Grand Prix to the more mundane Fiat Tempra used at the rain-affected 1993 Brazilian Grand Prix and the high performance version of the Opel Vectra used at the infamous 1994 San Marino Grand Prix. From , new procedures were applied for the first time during the Bahrain Grand Prix. The pit lane was closed immediately upon the deployment of the safety car. No car could enter the pits until all cars on the track had formed up in a line behind the safety car, they passed the pit entrance, and the message "pit lane open" was given. A ten-second stop/go penalty (which must be taken when the race is resumed) was imposed on any driver who entered the pit lane before the pit lane open message is given. However, any car which was in the pit entry or pit lane when the safety car was deployed would not incur a penalty. From , however, this procedure has been dropped, and replaced by software that calculates where a car is on the track and a minimum lap time it should take the car to get to the pits. Cars that enter the pits before this time limit has expired are penalised. When the safety car and the drivers behind it are on the start/finish straight, there is a red light at the exit of the pit lane. Drivers who go past the red light are disqualified from the race. This has happened to several drivers during the years, such as Juan Pablo Montoya at the 2005 Canadian Grand Prix and Giancarlo Fisichella and Felipe