hi my mk3 2l dura torq mondeo was fine then it wont start i had a loose battery cable and you can hear the starter moter spiniing but it wont crank im hoping its just the battery as we jumped it no bother so any suggestions do i replace my battery or the starter i hope its not the DMF i have read some horror stories on here but i have had no noise from the engine or clutch problems the car goes into gear fine please help