Recently has all suspension bushings replaced. Also a soft bearing that supports the camshaft (dont remember name)

When coasting or driving steady at 60-65mph, I recently noticed this heavy vibration. Past 65mph, it goes away. Under 60mph not noticed.

Any idea?

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Tulare County, CA

WTB list: (1983 300d)
-Exterior rocker panels below doors
-Gauge Custer plastic window/indicator icons

(1983 300D Turbo)

Wheel weight.

x2 on wheel weight. How old are your shocks?

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Did it vibrate before the work, immediately after, soon after? Where do you feel the vibration, in the steering wheel, seats?

Look for loose fasteners including lug bolts.

The soft bearing referenced is probably the driveshaft center support hanger and bearing.

Agree with others it is likely tire related. Have them checked, lug bolts, rebalanced, inspected etc.

Good luck!!!

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"Rudeness is a weak man's imitation of strength" - Eric Hoffer

X3 on the wheels most likely being the culprit. As was mentioned, check all lug nuts for tightness (although if they were loose they would most likely vibrate at other speeds as well) and check the shocks!

If you want to do the work, swap the front and rear tires and see if it goes away, or just bite the bullet, hit up a tire shop and get them checks and re-balanced

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)

Check tire inflation and look for bulges on the tire.

Have you driven it long enough to tell if you have odd tire wear?

However, changing the upper and lower control arm bushings changes the front end alignment.

You did not mention why you changed the bushings.

Tie Rod issue? Ball Joints?

Could not hurt to check the wheel bearing play.

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84 300D, 82 Volvo 244Gl Diesel

Nailed it. Passenger front tire has a worn spot on the outer face of the treads. about 3 inches of tread is completely gone.

Thanks guys, ill report back once replaced if it solved it.

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Tulare County, CA

WTB list: (1983 300d)
-Exterior rocker panels below doors
-Gauge Custer plastic window/indicator icons

(1983 300D Turbo)

Was it ever in an accident? I wonder if a bent frame could have caused this.

H

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1976 Mercedes-Benz 300D, Colorado Beige / Mahogany
www.hmclever.com

That sort of damage can result from a severe out of balance condidtion. Automobile tires have a natural resonance between 55-65 mph. Below or above that speed, vibration will all but disappear.

The above has happened to me 3 times since Steel Belted Radials came out.

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84 300D, 82 Volvo 244Gl Diesel

Whoa Diesel911, you are dating yourself there!