Jet like sound from 400E
I have been having this question ever since I bought my 92 400E, the car drives perfectly, but each time when launch from stand still, I can hear it makes a special sound, it feels like a jet turbine just starts, "humm...", the sound goes way after rpm reaches 2000.
I am not sure it is from engine or transmission, the sound is not loud at all, it sounds not bad either, but I have never heard this kind of sound from any other car I have driven.
400E owners, is this sound normal for your 400Es?
99 BMW 540i 6-speed 110K Km
03 SAAB 9-5 wagon 80K Km
92 400E (Sold) 245K km
Still missing the days with the Benz, it kept me busy.