In 2009 Mercedes-Benz once again provides the Formula 1 with the official safety car. It is based on the SL 63 AMG, while the medical car is a C 63 AMG Estate. Mercedes has been providing the official F1 safety car since 1996.
The safety car's main function, as its name implies, is to assist in maintaining safe track conditions throughout the Grand Prix weekend. It is driven by an experienced circuit driver and carries an FIA observer who is in permanent radio contact with race control.
If an accident or incident occurs that is not severe enough to warrant suspending the race, but which cannot be dealt with under yellow flags, then the safety car will be called on to the circuit to slow the cars down.
It will come on to the circuit with its orange lights on and all drivers must form a queue behind it with no overtaking allowed. The safety car will signal backmarkers to pass by using its green light until the race leader is immediately behind it, followed by the rest of the field in race order. Any lapped car between cars running on the lead lap must pass those cars and the safety car before proceeding slowly around the track to take up their correct position at the back of the pack.