Since Xmas I've had to jump start my TDI twice. I noticed it wasn't quite starting right every time and then it finally didn't start. The first was after it had been on the drive for a couple of days, not moved, over xmas. for a couple of days after it started fine. I was then in town and was sat in the car park eating some Greggs so had the radio on. Went to start the car and nothing again. It's been a week or so now and it's started ok since. Do you guys think it was a problem with the battery holding charge? How do I test a battery's charge?