Welcome to the Werkz. DDE light, isn't it detecting "Danger Danger Everywhere"?

Marti is right, get some diagnostics run on your car and see what comes back, the preheating coils are pretty much required to start a diesel, especially in the colder weather. When the engine cut out, what was going on at the time, were you driving or stationary and idling, or had you just started the car?