This just started today. After my 300d was started the second time today I heard what I can only discribe as a low pitch whine or roar from the engine bay. After about 10 seconds it went away. Has happened on and off all day only on startup and I can't place this sound even with the hood up and looking for the source. I want to say bad bearing in the water pump? I don't know any other way to describe this, car is running just fine, not hot, no loss of coolent or any other fluids. Just the noise and it sounds pretty bad. Any ideas or questions that may bring about an answer?

Is your starter disengaging properly or are you dragging it for that 10 seconds?

Steve...........

i actually have had the same sound for a few months. it sounds like a low moan at startup and then clears after about 5 seconds. it almost sounds like a belt slipping but i'm not sure. maybe timing chain ?? again car runs great, no leakages ..etc

__________________
1984 300D Turbo - 231k....totalled 11/30/07 RIP

I hate tracking down sounds, just wait for it to get worse or break then fix it. What ever parts making noise could do it for another 50k miles. My power steering pump makes a whinning noise for about a minute after the car is started in the morning. Other then that it is fine, I might change next year but if it doesn't get any worse, I probably wont.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200