Hello Stephen,
If it were mine, I would be getting the battery checked as the first port of call, if only to eliminate it from a list of suspected components.
Kind regards,
Gareth.
Hi, most of the newer Audis have this feature as well as Ford -Vauxhall and many more, its a safety feature to prevent the car starting in gear/drive and moving forward, pushing the brake pedal [automatic] or clutch pedal [manual] disengages the button on the pedal which cuts the ignition circuit.
Steve.