Maybe its a belt?

I've heard belts squeal before, maybe the belt is squealing until the heat of the engine heats it up?

I'm not a tech so thats just my opinion.

Does it sound like its coming from the front of the car? The rear? that might help the techs here diagnose it better.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon