jbeckley1

I'm looking for help. There is a sigificant humming noise that gets progressively louder as speed increases. It doesn't make the humming noise in park when I rev the engine so I'm suspecting that it may be something to do with the drivetrain. Any thoughts on this very annoying problem would be much appreciated.

sosh

Could be lots of things, some to look at are wheel bearings, tires, differentials, universal joints, transmission. This would be a place only where people could guess. My advice is to take it to a dealer or a good MB independent and have them drive and diagnose the vehicle correctly

jbeckley1

Thank you sir...

00ML430 Bulldog

could be your tires. what condition are your tires in?

jbeckley1

Tires are new within the last year - the noise started after the first rotation (well after)

miii88

it's the center driveshaft support.