BENZ AID - COMMON QUESTIONS AND ANSWERS

1982 300TD-T 315k miles Drivetrain Noise

At about 30MPH a whirring sound starts from the back end. Volume and pitch increases with speed... independant of road conditions. The noise only accurs when the drivetrain is under load/acceleration. While under load (as on a long grade), down shifting does not affect volume or pitch.

No clunkiness. Tire tread wear is "normal". SLS is working properly.

Any thoughts? Pinion bearing...Drive Shaft support bearing? I do not have a ton of experience in this area.

Thanks in advance!

Chassis Model Number

W123

Forums

Transmission / Suspension Specific Aid

Up the tire size 1983 300D Turbo Diesel

My stock tire size is 195/70 14 ~ 24.75 inch diameter. I was considering moving up to 205/75 14 ~ 26.1 inch diameter or 215/70 14 ~ 25.9. This would, in essence, give me the effect of an overall higher read end ratio. It feels as if the engine is revving more than it should at 65 - 70mph. Is this advisable? Also, what should the expected mile-per-gallon be for this year/model assuming everything is running correctly, and a conservative driving style? Thx, Bill

Chassis Model Number

W123

Forums

Transmission / Suspension Specific Aid

1985 190D 2.2: where is the fuel prefilter?

I'm perhaps exposing my ignorance, but where is the fuel prefilter on my engine? The picture included with the filter kit doesn't help me, as I can't locate just where that refers to. I suppose it's possible that the prefilter was removed at some time.
Since I plan to replace the gunked-up filter in the tank, I'd like to have a good prefilter in place to catch whatever I stir up in the process.
- Richard

Chassis Model Number

W201

Forums

Diesel Engine Specific Aid

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