Hi Guys,

I have the exact same problem as described by Mick on my '99 ML320, 133K miles. But the noise have persisted for at least 2 years now (22K miles), and it does not get any worst, so I cannot really pinpoint exactly where it is coming from. I believe it is either from the transfer case or the center shaft bearing. The truck runs great with no vibrations whatsoever or humming sound.

I don't trust my particular dealer very much. On my last visit they diagnosed a steering rack replacement at $2,800 when the leak was coming from the front differential center seal (payed under $200).

Mick, please let me know if you were able to resolve the problem.

Thanks,

Rene

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'99 ML320, '00 C280