159 Ti dashboard Vibration
After a few attempts I finally got to the bottom of my Dashboard Vibration, And it was very easy to fix.
Under the bonnet you will see a rubber strip along the full length of the engine bay, This over time moves or becomes brittle, It needs to be perfectly straight and upright to make a complete seal when the bonnet is shut. I removed the strip and put a few strips of isolating tape onto the metal underneath and to make a tighter fit when seal replaced. Had no vibration since.
It acts as a deadner mainly for the diesel engines to stop engine vibration so if its not 100% you will get dashboard vibration.
hope this helps