It should be adjustable through options when you are are in media mode.
It's called "speed volume" (or something to that effect). It get's louder the more you are pushing the engine so you can hear your music and inversely softer when your engine quiets down.

You can adjust the intensity of adjustment.

 

It's by design, but check your speed volume settings:

From Settings, go to Tone, Volume Settings and you can adjust the speed volume. Speed volume will adjust the volume of your music based on your speed. Go faster, it automatically turns up the volume to compensate, slow down, it goes back down.

 

I'm guessing I turn it up to the max setting for it to not keep going down?

Wish you just just deactivate it like on the older models.

 

the opposite; you need to turn it down to reduce the difference between the volume at speed and the volume at rest. its this difference that you are noticing, the speed activation is artificially turning the volume up

 

Has anyone actually found out how to turn this off? Noticed that it did it in the F55 Cooper D I had on loaner last week, manual equipped with Visual Boost.

My SD doesn't do it, don't know whether it's cause its Auto or cause of H/K? They seem to be the only specification differences between my car and the loaner.

 

Mine manual with hk haplens only if volume is high

I think its hk due to amp ...chows voltage so reducing volume ensures that there is enough for the start

So of like what happens with lights back before leds they dimmed a bit


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This doesn't sound like a speed related volume change if it is fine when you stop but only changes on startup.
I have noticed that if I change the volume using the steering wheel controls then the change in volume is not retained on startup, but if I change via the central knob then the change is retained on startup.
This is a feature I like as I can set the default volume and know it will always stay at the same level as long as I use the steering wheel controls for temporary changes.

 

i hadn't realised this. the reduction in volume each time i restart the car is a minor annoyance, i'll give this a go

 

Hi guys, I have this problem too and it's very very annoying! Anyone found the cause or a way to avoid it? I can't disable stop/start every time I drive my car...

 

Only happens when music is loud ...

I think it preserves all energy for the start instead of the amp and all

This is minimize the risk of the car not starting... due to insufficient power drained by amp etc ...


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Probably not. If that were the case, then the LED lights would go off first. Ever look at the heat sinks on those things? Lotsa amperage. Ditto the AC and cabin fans. and the MINI display screen. All much higher current devices than a stereo system, even cranked.

I suspect it is probably just to keep parents from getting blasted by the kids' volume settings when they start the car, or something. The engineers surely understand that long exposure to high volume acclimates your ears. Remove the sound, and the ears become acclimated to the relative quiet. If you return the sound to the previous level, it will feel louder than it felt before. Smoothing out the user experience, IMHO.

 

It's seems a bug, it's too random and with no reason. And the only workaround seems to be the stop/start disabling every time you drive the car, very very annoying...

 

Yeah


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It seems like a coding bug where it thinks every time the engine starts the volume should be set to max volume for startup. I used bimmer code to change the coding in the head unit module so the max volume at startup is 100%.