I have a Skoda Octavia 54 2.0TDI AMBIENTE 140BHP 190k. i i'm a taxi driver and was driving one night when at the lights my car automatically switched off thought nothing off it i started it back up carried on driving as normal then couple of hours later it did the same. i took my car 2 skoda main dealers and told them my fault, they dianoised the problem and told me it was my regulator. i replaced it and was driving around the my car started to juda/shake/jerk in low speeds e.g. 1st or 3rd in 30mph or 40 in 40mph then turn off when either at lights of leaving stand still. i took it back to skoda they dianoised it again and told me its my glow plugs and a thermostat which will solve the problem. i did that and drove but same thing is still happening skoda say they dont know a diesal special couldn't find a fault.........does anyone know what it could be????? i have no lights showing.