Thanks for that will be looking in that direction today. Has anybody changed the amplifier I believe these need coding on sat nav versions.

Hi I have a 2002 e53 with 16:9 sat nav head unit this is now screaming a high pitched scream when turned on.
I have a few friends in the industry one working at the stealership. he has never come across this fault before.
I wondered if anyone has encountered this before and what was the repair ...