Last weekend I change the rear disks and pads on my a3 2.0 tdi, finished the job went to start the car and the battery was flat (had only used the car 2hours earlier) anyway charged the battery up and was fine, then the following morning I went to start the car and again battery flat, I took the battery to get checked and the garage said it only had a 50% start capacity and that I would need a new battery. So popped to my local auto parts store and picked up a new battery, fitted then and good as new until the next day when I went out to the car and the battery is flat AGAIN!
So this time I jump start the car and manage to get to my local garage in which he advises me that the alternator is dead and I need a new one, so got it booked straight in for a new alternator and good as new. 2hours later I go out start the car, it starts fine then I ran back in the house as Id forgotten a few things, came back out to the car and an orange battery symbol is in the central display on the onboard computer, then my lights on the dash went out and then the car died.
Since then I haven't been able to start the car, I can jump start it but it will only last 10-15mins before dying again.
PLEASE SOMEBODY HELP ME (((((