Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-04-2003, 07:55 PM
Registered User
 
Join Date: Nov 2002
Location: Richardson TX (work) Mason TX (fun)
Posts: 52
70MPH vibration problem

I'm having some vibration between 70-75MPH with my 300SDL. Also seem to be having some front tire wear. I had the car aligned and put new tires on the front. Rear tires look good. Vibration improved with the new tires, but its still there.

It doesn't happen all of the time. It seems to actually be worse on smooth concrete interstate than asphalt 2-lane highway. At around 60MPH the steering wheel has a slight back and forth oscillation. I'm thinking bent or worn suspension parts. As far as I know, the suspension and shocks are original. Can poor shocks be causing this? Where should I start?
__________________
'87 300SDL
'96 F250 Crewcab PowerStroke
'00 Kubota L2600
'66 Malibu ragtop (SOLD, sob)
'01 BMW M3 ragtop
Reply With Quote
  #2  
Old 09-04-2003, 08:53 PM
moparmike's Avatar
You will rue this day...
 
Join Date: May 2003
Location: NW Arkansas
Posts: 732
not to hijack this thread...

But my 380 does the same thing at 90mph. At 100, it quits. It seems odd to me, but I dont do 90 much.
Reply With Quote
  #3  
Old 09-04-2003, 09:46 PM
Registered User
 
Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
Just a couple of suggestions.
First, switch the tires front to back & see what happens. You could do this one side at a time.
Second, given the age & mileage of your vehicle, I believe new shocks would not be a waste of time or money.
The Tire Rack has a very good Vibration Diagnostics chart on their site.
Printed one off a long time ago, because I HATE vibrations.
__________________
2007 C 230 Sport.
Reply With Quote
  #4  
Old 09-05-2003, 11:48 AM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
High speed vibe is unlikely to be related to shocks.

Wheel rotate test good idea. May have a bent wheel, which cannot be balanced. Most tire shops do not test for this, since it requires a second 'spin' on the machine.

Otherwise, something might be getting loose, like balljoints or anything in the steering rack. Loose bearings can cause this as well (not so common). The alignment folks should have caught any of this stuff, but from my experience, they often miss things.

Since your old tires were worn unevenly, that is a clue that something was wrong. Where was the wear? Did you get the alignment printout?

2 lane roads usually have a steeper crown, and lean to the right. Divided highways have a gentler crown, and lean to the left in the left lanes. This could be another clue.
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #5  
Old 09-05-2003, 02:30 PM
Registered User
 
Join Date: Nov 2002
Location: Richardson TX (work) Mason TX (fun)
Posts: 52
Bent wheel

I've thought about the possibility of a bent wheel. I ran over a big pothole several weeks ago. Not sure if it is related since I didn't notice the vibration right away.

I will try swapping the front tires with the spare and see if anything changes.
__________________
'87 300SDL
'96 F250 Crewcab PowerStroke
'00 Kubota L2600
'66 Malibu ragtop (SOLD, sob)
'01 BMW M3 ragtop
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 11:12 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page