Hissing from speaker
Currently experiencing a really strange problem with my e92 335d.
I'm hearing a hissing noise from the front passenger speaker when the radio is not on, and sometimes I hear a little popping noise.
When I turn the car the off the noise continues, and only stops when I open the door to get out.
With the radio on the popping noise is still evident although this noise is very intermittent, the hissing cant be heard above the radio.
Have no idea where to start looking for the source of the problem.