Time to replace the center support bearing, and that means removing the flex disks.


I've read that the flex disk hardware (bolts, nuts, etc) is "single-use", so I shouldn't reuse it.


Do I really need to use new bolts, nuts, etc? I can't seem to find replacement hardware unless I buy a kit, which includes new flex disks (my flex disks are OEM and only a few years old).

look for any signs of the rubber starting to crack, if OE and not that old I would reuse them. I put blue loctite on the bolts and reuse them too.

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

I've reused all of it when it was in good shape on multiple vehicles, never had any issues.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

The nuts are self-locking and are technically single-use. The bolts are just standard hardware. As mentioned above, blue Loctite on the threads and you're golden.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Unless you just replaced them, swap the discs while you are there. One less thing in the list.

As a rule, Mercedes says all self locking nuts are single use. (replace as a matter of course, or something like that) Since these are not the kind of locknut that uses nylon to lock, a certain amount of thread damage occurs to the bolt. Does it bother me? No. Maybe you wouldn't want to reuse them 15 times, 5 times, twice, that's up to you.

Thanks everyone.


Blue Loctite it is.