Recently changed the turbo on my 2009 A4 2.0 TDi convertible car started ok then just stopped, restarted but the crank was very slow. Since then the car only turns over very slow and doesn't fire have checked battery with tester and multi meter and is showing as ok. Oil and filet was changed and a oil flush on turbo change (turbo was smoking reason for change). Any ideas as at a loss at moment when you turn car over and it cranks very slowly all lights die on dash like total power drain.
