A warning light comes on after 20-30 minutes of driving, "Gearbox Malfunction, you can continue driving. (Limited functionality), as soon as the vehicle comes to a standstill it flashes 'N' on the dash and another warning light appears "Parking Brake Malfunction" then the gear is as if its in neutral, when you shift gears it shifts only to N and gets stuck there. It will come out of N only if you switch the car off. The car then refuses to start until it has cooled down after 15-30 minutes then it starts and goes as if nothing happened. This will be for another 15-20 minutes then the Gearbox malfunction light will come back again and the whole process restarts.