[Thomas118i]

I have Harman Kardon audio and business navi. I have seen the possibility of the audio-system beeing the reason for the different engine sounds, but that would mean that the cars with "regular" hifi or just standard audio system have some kind of ASD. If this is the case, then this would be very interesting information which the dealers should be very aware of.

And yes; the sound is just the same in every driving mode.