Armed with a shopping list and some things to drop off, I get into my Mercedes C240 to run my days errands. The car starts up perfectly as I would expect, however as I put the car into reverse, the engine splutters and stalls... It does not quite catch again when I try and crank the car back to life, it splutters, coughs and teases me by coming so close to starting but it just doesn't quite get there. Worried, this car has never had any problems before, I begin pumping the large gas pedal to try and help the car to start, now of all days for the problems to begin!