I've got a driveline shudder when under power. The car drives smooth as silk as long as I'm not on the gas, but as soon as I give it any power, there's a shudder and grumble from the driveline somewhere. It sounds like it's coming from the back end.

It was worst when it first started. I was doing about 70 when it suddenly sounded like I had a motorcycle in my rear right blindspot, but it was coming from the car, and I could feel the shudder in the gearshift. It faded and went away entirely over the next 1/2 mile, but returned a shortly, and is now bad enough that it seems risky to drive it.

-Dirk R

Sounds like a bad flex disc.

I would not drive it in this condition.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

(Edit)
I come from a Detroit world, so I had no idea about what a flex disk is. I'll check it out, look for cracks, and order it up if there are any.

Thanks.

-Dirk R
(Edit)

You have two flex discs, one on each side of the drive shaft.

Check out this link for a detailed description and pictures:

http://www.dieselgiant.com/Mercedes%20flex%20disc%20failure.htm

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

u joints, drive shaft out of balance

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

Check the front flex disc, that is usually the one that fails most often.

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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg
1991 300E - 212K and rising fast...