S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

W221 Flex disc

Old Apr 10, 2022 | 11:10 AM
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2010 S550
W221 Flex disc

I believe I’m experiencing some flex disc issues. I haven’t got under the car to see if they are cracked but vibration when getting up to speed on the highway is what I fee underneath the passers side.

Could someone please assist me with the correct part # for rear and front flex discs on S550 4matic 2010...
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Old Apr 10, 2022 | 12:47 PM
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From: Tewksbury, MA
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https://www.fcpeuro.com/products/mer...110000#fitment

A little over $80
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Old Apr 10, 2022 | 12:58 PM
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Originally Posted by RichDMB
Thank you! Does this fit both the front and rear?
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Old Apr 10, 2022 | 01:39 PM
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Future reference, see attachment for complete parts list.



Attached Files
File Type: pdf
Parts_Information.pdf (42.1 KB, 108 views)
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Old Apr 10, 2022 | 02:15 PM
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Originally Posted by konigstiger
Future reference, see attachment for complete parts list.


Thank you!
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Old Apr 10, 2022 | 03:29 PM
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2010 E550, 273 Engine: 2012 S550, 278 Engine
Originally Posted by charmessence
I believe I’m experiencing some flex disc issues. I haven’t got under the car to see if they are cracked but vibration when getting up to speed on the highway is what I fee underneath the passers side.

Could someone please assist me with the correct part # for rear and front flex discs on S550 4matic 2010...
Just about the vibration:

I just went thru this and most of my vibration went away with engine and transmission mount replacement but some of it remained. The dealer pointed out flex discs having some cracking on them and I had them changed and this seemed to really get rest of vibration go away. The old discs did not look that bad at all though. They had some cracking (dry rot) but it was not bad. I just went by their recommendation. Only negative now is the noise I get that I hope is the center bearing and not the tranny itself. That is in another thread but for vibration the flex discs had something to do with it in my car so as it is the lowest cost (DIY) work to do for vibration troubleshooting replacing them rubber parts in a 10+ years old car is not a bad idea at all.

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Old Apr 10, 2022 | 06:36 PM
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Originally Posted by Arrie
Just about the vibration:

I just went thru this and most of my vibration went away with engine and transmission mount replacement but some of it remained. The dealer pointed out flex discs having some cracking on them and I had them changed and this seemed to really get rest of vibration go away. The old discs did not look that bad at all though. They had some cracking (dry rot) but it was not bad. I just went by their recommendation. Only negative now is the noise I get that I hope is the center bearing and not the tranny itself. That is in another thread but for vibration the flex discs had something to do with it in my car so as it is the lowest cost (DIY) work to do for vibration troubleshooting replacing them rubber parts in a 10+ years old car is not a bad idea at all.
Thanks! I do know I need engine mounts and need to check if I need transmission mounts as well. Both I know I have to find a shop to do both but am hoping the flex discs are a simply diy.... also I do understand I will need a star kit to take off the flex discs, if so I have to find a set

I have a gift card I could use on amazon, anyone know if this part fits...

Febi Propeller Shaft Flex Disc Kit https://www.amazon.com/dp/B000P4S09E/ref=cm_sw_r_cp_api_i_VK4PYE3076N99R9VDS7C

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Old Apr 10, 2022 | 06:50 PM
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Get the kit on ebay instead.

https://www.ebay.com/itm/313225820769
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Old Apr 11, 2022 | 04:21 PM
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Originally Posted by charmessence
Thanks! I do know I need engine mounts and need to check if I need transmission mounts as well. Both I know I have to find a shop to do both but am hoping the flex discs are a simply diy.... also I do understand I will need a star kit to take off the flex discs, if so I have to find a set

I have a gift card I could use on amazon, anyone know if this part fits...

Febi Propeller Shaft Flex Disc Kit https://www.amazon.com/dp/B000P4S09E...3076N99R9VDS7C
What is a “star kit”? The disks bolt in ends of drive shafts alternating the bolt holes. What would a “star kit” do?
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Old Apr 11, 2022 | 04:37 PM
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2010 S550
Originally Posted by Arrie
What is a “star kit”? The disks bolt in ends of drive shafts alternating the bolt holes. What would a “star kit” do?
My apologies.... i meant a star bit set... I am not exactly sure what size the bolts are on the flex disc
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Old Apr 15, 2022 | 09:51 AM
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Anyone know offhand the size bit I would need to remove/install the flex disc?
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