Radio Volume fades in & out
On my 2004 530i, with the arrival of the warmer weather my radio volume does hold a setting and quickly fades to no volume. I can adjust the volume up using the toggle switch on the steering wheel, but it quickly fades away again. Does anyone have any idea(s) what is the root cause of this malfunction and what the corrective action would be to rectify.
Thanks to all who respond.