[H175Driver]

Firstly, the car is booked in to BMW to sort this out but I’m interested to find out what is causing the problem and if anyone else has experienced it.

About a week ago I noticed there was no warning tone when I exited the car with the lights on (not in auto). Then I had a couple of drives where no sound came from any audio source for five minutes or so then suddenly came back.

This has now escalated to a note on the professional audio display saying “ No Warning tones” and a total loss of audio , tones ( ie parking sensor etc) and loss of Bluetooth, plus crackles and slight feed back from the speakers even when turned off by pressing the volume knob.
I would get and then loose audio/tones constantly over one short drive until now where I have nothing at all and the note appears when I start the car.

I have checked in the boot for any connection/ wire issues but obviously can’t check behind the dash. A bit confusing and I’m missing my music.

Any thoughts?

2016 435d M Sport Convertible

[teaston]

Either a loose connection or faulty control module I should think.

[H175Driver]

Thank you for the reply teaston,
Sorry but I've been away hence the late reply .

Turns out it was the HiFi Amp that was faulty and was replaced under warranty , annoyingly all presets / driver profiles / seat memory etc were lost during the fitment.