Muffler hanging rubber doughnuts

[terry280SL]

The exhaust of my 280SL started resonating against the bodywork - a reasonably irritating noise!
On inspection the two rubber doughnuts holding (or in this case not holding) the rear of the muffler were perished - as were the two at the front (missing actually).
I replaced these and all is well.
But I also notice two more rubber doughnuts holding the rear of the centre muffler.
These look a little different.
I've looked on a bunch of sites and nobody makes a distinction between the four back rubber doughnuts and the front two.
But there is a muffler hanging set that has the four rear and two front doughnuts along with a whole lot of other brackets and bolts etc. These two look different but don't appear to have a separate part number - but they are visually quite different.
The rear muffler set are all part number 113 492 0082.
What is the part number of the two front doughnuts?

[Pawel66]

From the EPC: I think the number you are quoting is for the rings that go in the middle of the car, you need 2 of them (I think these are the bigger ones).

In the rear you have A107 492 00 82 (a new replaced number) and you need 4 pieces (shorter, tougher).

It is, perhaps, the time to replace the insulating plates (A 000 492 09 83 4pcs.)? They protect rubbers.

This is if my memory serves me well as I struggled with rear muffler noise against the body a couple of years ago.

Do not forget the "Forum way" of fitting the rubber rings in the rear (with middle hanger fitted, support the rear muffler, unscrew the rear brackets, lower down the rear muffler a bit and support it, hang the upper brackets on rubber rings with screws sticking down from them, then lift the muffler with the bottom brackets and screw on the nuts), otherwise you may be inclined to swear a lot.

Exhaust needs to be supported at all times (in the rear or in the middle) not to break the exhaust manifolds.

[mrfatboy]

Here you go👍

Exhaust donut size
-------------------
Large 1134920082 (center muffler)
Small  1074920082

[Pawel66]

Great, so we have it confirmed!

Good luck!

[terry280SL]

Thankyou for the replies and for the very useful tips - I really appreciate.

I've uploaded the kit to both illustrate the differences and to show why I'm confused.

The 4 smaller doughnuts for the rear muffler are quoted as 113 492 0082 on all the sites I've seen: Millers, Authentic Classics, The SL Shop etc
Niemoller quote the back 4 as 113 492 0082 and the front 2 as 107 492 0082.
There seems to be a bit of inconsistency on the numbers.

I think it's probably time to buy the whole kit and replace everything as you suggest as it hasn't been renewed since 1994!

Again, thanks for the replies and advice.

[mrfatboy]

You can verify here.  Look at parts 17 & 23.  Don't let the location of the parts in the drawing confuse you.  Maybe why other websites got it wrong. 😀

https://nemigaparts.com/cat_spares/epc/mercedes/1/fg/113044/68h/49/001/

[Pawel66]

Extra ring - not sure where it goes. 3 insulating plates while you need 4. You are sure about rubber quality (critical!!!)? Rubber needs to really hold the whole thing in place and not perish by next summer.

I bought rubber, insulation and end pieces from MB. Some of the brackets from SLS as they were NLA in MB. Just my view.

[Rick]

Many of the cars have a rubber ring which supports the emergency brake cable up and keeps it off the muffler.

[66andBlue]

The mystery rubber ring ...  .... it is all discussed here: https://www.sl113.org/forums/index.php?topic=9569.msg63346#msg63346

The part is available: http://www.authenticclassics.com/Handbrake-Cable-support-for-230SL-250SL-280SL-p/auth-008164.htm

[Pawel66]

Yes, that part I know. Very well, thank you. Why is it a part of muffler suspension?

Or this is meant to be "all hanging rubber set" ?