Police are appealing for witnesses to a shooting outside the McDonald's restaurant in the Old Kent Road in the early hours of Saturday 25 June.
A 22-year-old man was shot in the neck as he left the restaurant at about 2.30am. He was with some friends who had just eaten at the 24-hour restaurant. They were in two cars, both Mitsubishi FTO model sports cars.
Two youths approached one car and spoke to the victim, who was in the driver's seat. One youth then fired through the windscreen, injuring the victim in the neck. The victim drove away at speed from the car park and was subsequently in collision with a parked van at the junction of New Cross Road and Goodwin Road.
He was taken to a South London hospital where his condition remains critical but stable.
The incident is being investigated by the specialist shooting team Operation Trident, led by DCI Peter Valentine.
DCI Valentine said: "Although late, there were lots of people around this busy area – people using the restaurant and the nearby Asda supermarket. I am anxious to hear from anyone who was in the area and may have seen anything of the incident."
Officers are analysing CCTV footage of the area.
The two youths are described as black and in their late teens.
Anyone with any information should call the Trident incident room on 020 8247 4553.
Police say that no other people were injured.