Does my 240D sound healthy to you?

[DieselAddict]

I'm running about B50 right now which has toned down the combustion noise but helped reveal another engine noise which is audible in this sound file. Can you hear it? The noise has always been there as far as I remember regardless of the fuel used, it's just that on regular diesel fuel the louder combustion noise somewhat masks the other noise. What do you think of this sound? If anyone else has a sound file of a 240D idling (preferably warmed up), I'd like to hear it to make a comparison.