I have had similar experiences on different vehicles. Almost always it has been the tires. Tires can have defects that cause out of roundness and density differences that feel exactly like and unbalanced wheel. I usually buy cheap tires and I have the problem often. The only solution is to swap out the tire that is rough. Shaving, balancing, rebalancing, nothing will fix a tire that is not uniform in density or composition. Never had a rough tire with Michelin.

Mark

Funny, because that's what is on the car. Michelin MXV4's

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles

I had these same sort of symptoms on my 85 300D.
I had just replaced the engine, and soon after I started to feel more than
hear, something rough in the steering wheel and fuel peddle.
this was over the course of 3000 miles.
at first I thought, what`s wrong with the new eng? as time went on felt like gear noise, or roughness. the towards the end like snow tire type noise, but now loud.
changed the L/F tire, no change. finally pulled the hub and the inner bearing cage was starting to deform. replaced the bearings and races and
smooth as butter now. both hubs never felt hot.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works