There you are, happily driving along, listening to Ed Sheerans album for the 700th time in three days, when suddenly, a horrible clanking, snapping, clunking noise emanates from some hidden dimension of your car. ‘Oh God, what was that’ your panicked mind shouts. You’ve got no choice but to pull over and assess the damage, despite the fact that you have no idea how to assess damage. Hand's on hips, looking at the engine, shaking your head. What a nightmare. Breaking down is o