A few times now I have gone out to start my car to go to work put the key in turned it and nothing has happened no turning over of the engine just the dash board lights come on then after around 5-10 seconds the car will start but be juddery when it does, took it to Audi today they put it on diagnostic machine and said nothing is wrong and that when I start the car I should turn the key so dashboard lights are on wait a while then start it so glow plugs can warm up. I find this ridiculous I have a 2010 car not a 1990 car, has this happened to any one else? I've seen a few posts like this in an Audi a1 forum but not a3.