been having this strange whine on acceleration and cruising.
Radio On or Radio Off the whine remains the same. Can anybody help diagnose this?

 

Has any type of aftermarket/non-factory audio source been installed?
Check all grounds. Battery, alternator, chassis. It's a ground loop somewhere is my best thought.

 

nothing aftermarket. took it to a mechanic this morning and he told me its a turbo whine. funny because the bentley is so well insulated and i think it is from the speaker. will wait for him to come back.
anybody else experienced a turbo whine?