So my Audi a3 80 1.4 tfsi 2010 has been in limp mode but that was a while ago. Since then all was well until 3 days ago the car sometimes had a bit of power but now none at all. Feels like there is no turbo! When accelerating there is a loud hissing sound better heard from the passenger seat when window is open. Took it to a friends garage and they took the air filter off and another part which made the turbo spinning part visible. There was a tiny bit of play/movement in it and whereas its only meant to spin. Unplugged the MAF sensor but no difference. What could it be?!