Just a quick question, my Dad recently bought a Mk3 Mondeo TDCi. He's been looking the the handbook and has come across a section regarding the ignition. It states that after he has put the key in the ignition, a "coil" light should appear on the dash. After 3 seconds this should disappear and then it is safe to turn the key and start the engine. Does this sound correct? If so, why? What damage, if any, will be caused by him just turning the key straight away without waiting for the coil light to disappear?