Inspect your driveshaft flex discs - Mercedes-Benz Forum

Go Back   Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W210 E-Class
New User? Register - Forgot Password

BenzWorld.org is the premier Mercedes-Benz Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-30-2009, 09:21 PM   #1 (permalink)
BenzWorld Member
 
Marinel's Avatar
 
Date registered: Sep 2007
Vehicle: '85 300D, 1997 E320(sold)
Location: Atlanta
Posts: 83
Exclamation Inspect your driveshaft flex discs

I started getting a weird vibration at highway speeds only if i put load on the engine. After inspecting the under the car I found that my flex disc had pieces of it missing and was cracked. This is what my flex disc looked like at 122k miles. The other one will be replaced soon since it has some small cracks in it.
Attached Thumbnails
Inspect your driveshaft flex discs-flex-disc.jpg  
Marinel is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-30-2009, 10:17 PM   #2 (permalink)
BenzWorld Elite
 
Kajtek1's Avatar
 
Date registered: Dec 2005
Vehicle: W210 E300DT x2/w211wagon4M / Ford SD. Seeking diesel pushmower
Location: CA Bay Area
Posts: 26,598
I replaced mine in much better shape at 230,000. Don't know if it was original, but most likely it was.
Beginning signs of deterioration are hard to notice for untrained eye. I noticed that distances between the bolts were not even on both sides.
Kajtek1 is online now   Reply With Quote
Old 01-31-2009, 12:14 AM   #3 (permalink)
BenzWorld Elite
 
Check Codes's Avatar
 
Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Posts: 28,469
Hey, marinel. Long time no "see". Hope all has been well, glad you caught that before it completely let go.

Were you able to salvage it with a repair kit or did you have to buy a whole new one? I plan on checking mine when I do the diff fluid and trans mount, and have already priced them. I was surprised at the cost for what they are, several times the cost of a U-joint but no visible reason they should be.

Take care and enjoy the ride,
Greg
__________________
Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy; its inherent virtue is the equal sharing of misery. (Winston Churchill)
Check Codes is offline   Reply With Quote
Old 01-31-2009, 08:31 AM   #4 (permalink)
BenzWorld Elite
 
Date registered: Jan 2004
Vehicle: 1959 220S cabriolet, 1983 240D original owner, 1999 E300 turbo diesel, 1988 560SL, 2003 SLK320
Location: Ocean Isle Beach, NC
Posts: 3,304
Flex disks are one of the checks to be done on an A/B service. Here's an example of why those services need to be done by someone.

Len
sokoloff is offline   Reply With Quote
Old 01-31-2009, 09:03 AM   #5 (permalink)
BenzWorld Member
 
meooem1's Avatar
 
Date registered: Nov 2006
Vehicle: 99 e320 wagon gold/tan 140K miles
Location: huntington beach, ca
Posts: 279
I know that the disc has something to do with the drive shaft. What is it's purpose and where exactly is it located. see a ton of these on ebay, but never knew what they were. sure they are junk on there though.
meooem1 is offline   Reply With Quote
Old 01-31-2009, 09:17 AM   #6 (permalink)
BenzWorld Elite
 
Kajtek1's Avatar
 
Date registered: Dec 2005
Vehicle: W210 E300DT x2/w211wagon4M / Ford SD. Seeking diesel pushmower
Location: CA Bay Area
Posts: 26,598
Those are MB solution for shaky U-joints. There is one between transmission and drive shaft and the other on the differential end.
There is big choice of them with price difference going in 2-fold,. I bought the OEM replacement what was the cheaper year ago
Kajtek1 is online now   Reply With Quote
Old 01-31-2009, 09:21 AM   #7 (permalink)
BenzWorld Elite
 
Date registered: Nov 2005
Vehicle: 1996 210.020
Location: Adrift on a continent...
Posts: 3,972
There are two of them. One is at the back of the transmission, the other is at the front of the rear differential.

These isolate vibration from the drivetrain. They act something like a universal joint, but allow only a very small deflection from straight (just over one degree, if I recall correctly).

The front is usually the one that is in worse shape. Also, if the front lets loose on the highway, your SRS system will most likely be fully activated (all airbags and belt tensioners will fire).

There is also a u-joint in the center of the driveshaft.
Matt L is offline   Reply With Quote
Old 01-31-2009, 09:24 AM   #8 (permalink)
BenzWorld Elite
 
Check Codes's Avatar
 
Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Posts: 28,469
Quote:
Originally Posted by meooem1 View Post
I know that the disc has something to do with the drive shaft. What is it's purpose and where exactly is it located. see a ton of these on ebay, but never knew what they were. sure they are junk on there though.
Hey, meooem1. Flex discs are just another way of transmitting torque through a gentle bend. Thre more common way is through the use of U-joints. Same idea, only a different way of executing it.

Re ebay, I'd tend to agree. Doubtless there are legitimate sellers of quality goods on ebay, but if the price is "too good to be true" you know what you're going to get, just like the guy on the corner with the $100 Rolex watches.

Generally speaking, I'd never buy anything on ebay that is "mission critical" unless I had other knowledge as to the veracity of the seller AND the quality of the part.

And Len is 100% correct, it is fine to DIY the A and B services, but they absolutely have to be done. Simply because we jokingly refer to them as "glorified oil changes" does not mean the checklist can be ignored.

Take care and enjoy the ride,
Greg
Check Codes is offline   Reply With Quote
Old 01-31-2009, 10:00 AM   #9 (permalink)
BenzWorld Elite
 
Kajtek1's Avatar
 
Date registered: Dec 2005
Vehicle: W210 E300DT x2/w211wagon4M / Ford SD. Seeking diesel pushmower
Location: CA Bay Area
Posts: 26,598
Well. My local stealer performed full safety inspection without removing belly pans.
You think he took a look on the disks?
Kajtek1 is online now   Reply With Quote
Old 01-31-2009, 10:10 AM   #10 (permalink)
BenzWorld Elite
 
Check Codes's Avatar
 
Date registered: Mar 2005
Vehicle: '01-E320 & 02-ST2
Location: John 15:18-19
Posts: 28,469
Quote:
Originally Posted by Kajtek1 View Post
Well. My local stealer performed full safety inspection without removing belly pans.
You think he took a look on the disks?
Well, we know he didn't, but that was that freebie one, right?

I guess I'm assuming(!) that when they are paid to do an A or B service (as opposed to a free and somewhat nebulous safety inspection) they actually run the checklists.

I've always been wary of those "free inspection" things that come in the mail, not only from dealers but all manner of shops. I have this hope that at least some of them are legitimate.
Check Codes is offline   Reply With Quote
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W210 E-Class

Bookmarks



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Topic Author Forum Replies Last Post
Flex Discs, which way is the right way? BenzQC W126 S,SE,SEC,SEL,SD,SDL Class 11 02-23-2012 02:35 PM
Flex Discs bigdon W126 S,SE,SEC,SEL,SD,SDL Class 12 06-11-2007 03:14 PM
flex discs.. change out??? mountainredneck W123 E,CE,D,CD,TD,TE Class 3 05-05-2007 03:41 PM
flex discs Art W210 E-Class 0 08-08-2006 08:21 AM
How do I replace the front Flex Disc??? Does driveshaft need to come all the way out??? GermanCarNut W124 E,CE,D,TD Class 5 06-19-2004 08:15 AM


All times are GMT -7. The time now is 09:24 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.