Robbers then attacked the driver and two terrified tourists with pepper spray before forcing open the boot of the luxury vehicle.
They seized jewellery, clothes and leather goods in a haul valued at 5million euros, according to local reports.
The incident unfolded at about 9pm last night shortly after the women had been landed in their private jet.
The identity of the victims is not yet known and an investigation is underway.
It is the latest in a long line of high-value robberies to hit France and comes just weeks after reality TV star Kim Kardashian was robbed at gunpoint in a Paris flat.