It's a luxury car, it's supposed to have wood! ...it's a far cry from a Rover believe me.
I think it sounds like someone has installed a Sperm Whale in the back box, what on Earth is that wooping/whining sound it makes ...if it didn't have that sound it would sound ok.
Yes, I did not like that tbh.
The sound - I think - is the wastegate / dump valve at work.
I would be some what surprised if there was a dump valve on a diesel. With no throttle to close you don't get the high pressure air build up in the inlet pipe during lift off or gear changes in the way a petrol car does.
My diesel Scania has one! - same as just about every HGV I've driven! - its the turbo that requires the wastegate, not the fuel powering the engine that drives it afaik.
I'm guessing that e60 in the OP is running way beyond its standard boost hence the screaming wastegate.![]()
Psst, the video was an E46 and Rilot's is an E65 ...no E60s to be seen.
The wastegate and dump valve are two completely different things. One limits the boost under load the other dumps boost on gear changes and throttle lift off when the throttle is closed.