i actually think it should be compulsory to know a certain amount of roadside repairs to be able to drive. My sister used to have a Corsa and rang me saying her temperature gauge was on the red and smoke was coming from under the bonnet. She was in a traffic jam so I told her to turn the car off immediately and let it cool down or she will do serious damage. her reply was 'no i cant stop ive got to be in town in 10 minutes it will just have to wait until im there!!!' so what happened, the radiator went bang and water pissed out all over the road meaning she couldnt nurse it home and fried the engine. Clever.