HAD AN ENGINE WHINE it was all over the rpm range . to be honest it sounded like an old Ford pickup so they replaced the p/s pump. the old p/s pump was put back on when they realized it was the bearings in the alternator (water-cooled) and idler pulleys. strangely I hear this noise on Mercedes as well as they whine past so the alternator must be on a lot of cars.. 2005 4.8is blk/blk