Hi to everyone here! I have just bought a 53 plate 2.0tdi sport and it's not going well already so hope to get some help! when i accelerate hard, the car becomes jerky... starts to accelerate, then stops and goes again, and when i was getting a feel for her on the motorway i couldn't get it over 3000rpm in either 5th or 6th gear which meant it wouldn't go over 105mph. it's been serviced regularly from new with audi, and was last done about 2k miles ago. i previously had a vauxhall astra which had a similar problem after the altenator was replaced and it was put down to the battery going dead flat, and as such, loads of errors showing upon the ecu, and once they were cleared ran smoothly again. the mechanic said the car had entered "limp home" mode and i was wondering if audis have something similar or i have a more sinister problem?? sorry if something similar has been posted before, but couldn't find anything like this. thanks in advance for your help!