Morning. Just dropped the A3 2.0TDi off at the garage to get the turbo looked at. It's making what can only be described as a loud siren noise when spooling up at 1500 revs, then when backing off it makes the same noise but backwards... sounding just like an ambulance (in the UK). Basically, reading through my used car warranty it's not clear if the turbo is covered. Has anyone else experienced this noise who can comment on the outcome? I would like to be able to go back to the garage with some amunition when collecting the car later. Thanks.