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  #1  
Old 07-29-2000, 12:30 PM
Benzman500
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i have a 1985 500sel euro i drive every where at 65 it is the best ride on earth smooth and then you put it up to 70-78 it vibrates. once you get up to 80 its got a little shake 90 its smooth once again.

------------------
Dan Younes
---------------
1985 euro 500sel 220k
1981 300sd 278k sold
1979 240d 298k sold
1983 300sd 272k sold
1989 chrysler 2.2l Turbo
Leabaron 130k
1996 C220(hopefully soon)
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  #2  
Old 07-29-2000, 05:34 PM
LarryBible
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Does the vibration seem to match the speed of a rotating tire, or is it a much higher frequency?

Have you checked the frontend for tightness?

I would imagine that more often than not, tire balance is the cause.

Good luck,

------------------
Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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  #3  
Old 07-29-2000, 05:37 PM
Benzman500
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yes but y would it smoth out at i higher speed


------------------
Dan Younes
---------------
1985 euro 500sel 220k
1981 300sd 278k sold
1979 240d 298k sold
1983 300sd 272k sold
1989 chrysler 2.2l Turbo
Leabaron 130k
1989 Dodge Carvan Se 285k
1996 C220(hopefully soon)
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  #4  
Old 07-29-2000, 05:41 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Dan, tire vibrations due to imbalance have an inherent harmonic to them. That is to say, they will come and go at different speeds. Usually, the harmonic is a multiple of the rotational speed of the tire. Have the tires speed balanced..

------------------
Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE
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  #5  
Old 07-29-2000, 05:44 PM
Benzman500
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16,000 miles ago



------------------
Dan Younes
---------------
1985 euro 500sel 220k
1981 300sd 278k sold
1979 240d 298k sold
1983 300sd 272k sold
1989 chrysler 2.2l Turbo
Leabaron 130k
1989 Dodge Carvan Se 285k
1996 C220(hopefully soon)
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  #6  
Old 07-29-2000, 06:40 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Oops, it's time to do it again.

------------------
Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE
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  #7  
Old 07-29-2000, 06:54 PM
Benzman500
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how often should i have them balnced
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  #8  
Old 07-29-2000, 09:43 PM
Robert W. Roe's Avatar
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Join Date: May 1999
Location: Lehigh Valley PA
Posts: 1,322
I have a semi-related question. How old can tires be and still be safe? My wife's Subaru has four year old tires from Sam's club. Some of these harder rubber tires are good for 60,000 miles, which could last 10 years if only driven 6,000 miles a year. I'm asking because her car has a vibration between 60 and 70 mpg. Thanks for any thoughts.
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  #9  
Old 07-29-2000, 09:44 PM
LarryBible
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Benzman,

As long as you don't lose a weight, they will go the life of the tire in many cases. Sometimes not.

With the shape of the outside rim of so many wheels being different, they many times use the wrong weight type and they won't stay on.

It's getting easier to find a balancer who is familiar with using tape weights for the outside weight of the tire. The newer wheels are deep enough that they can put tape weights on the inside diameter of the wheel as outboard as possible. If you can find someone who will do this, they will stay in place. An added benefit is that they don't scratch up your wheels in the process. I've had very good luck with this method.

Good luck,

------------------
Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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  #10  
Old 07-29-2000, 09:53 PM
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Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
As far as balance goes, I have all of mine checked every 10,000 by my local tire & wheel guru. As the tread wears, the balance changes, no matter whose brand of rubber you are buying.. Every checkup almost always produces an adjustment of the balance. This is a cheap way to save on unnecessary wear and tear on the suspension.

------------------
Jeff Lawrence
1987 300e
1989 300e
2000 Dodge Grand Caravan SE
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  #11  
Old 07-30-2000, 11:50 AM
LarryBible
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jeff makes a good point. There are two reasons I don't do periodic wheel rebalance. I only do it when I feel an imbalance.

First reason, it only takes me two and a half months to see 10,000 miles go by, I'd spend too much time at the tire store which I indicated in a previous reply is not my favorite place to go.

Second reason, it only takes me two and a half months to see 10,000 miles go by, so they're all road miles at 65 to 75 mph(unless I'm in my 300E, then who knows how fast I'm going). If you don't know the sections of road you're driving on well, then many times you don't know if what you're feeling is road or tire vibration.

If I have weights that have stayed on, my wheel balance is silk smooth with no rebalance while I'm driving to the tire store for a new set of tires.

jeff makes a second good point, and that is that extreme wheel imbalance is not healthy for your front end. I must have kept the wheels balanced on the old 240D, because the front end went about 515K miles before I put a whole front end under it. When I tore it apart it was amazing how tight everything was. I did have one ball joint that was gone. I took the entire front end in very tight condition out from under a relatively low mileage parts car I bought.

If you drive short hops and especially over rough roads and drive the mileage per year of the average driver, which I understand is 13K miles per year, 10,000 mile wheel balancing would not be a bad idea. You would only have to fight the kids at the tire store only once a year.

For those readers who are in the tire business, I don't hate all tire stores, I've just had some experiences at a few tire stores that have been very trying. As in all businesses, I'm sure that there are some great tire stores out there. Maybe one of these days I'll be lucky enough to find one of you guys.

Have a great day,

------------------
Larry Bible
'84 Euro 240D, 523K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles
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