Well...I've been running B99 for about a year now. The rubber around my filler neck looks good till you look at bottom center of it. I poked my finger through it today. It's melted for lack of a better word.
I used search and found this post for a "diaper" to cover this area...looks like a good idea. But first, I want to replace the rubber grommet. Just wondering is this as a simply DIY?

Thanks all!

It's mind numbingly simple. Pull the old one out, push the new one in. Use a bit of dishwashing liquid to slip it in if it won't do right.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Never run across anything that simple on an MB...LOL!!!

Thanks

is there some sort of adhesive for this? my old one that is cracked and broken seems to be sort of stuck to the side of the car. does the new one need to be "glued" on as well?

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1985 300D - 1984 Euro 280E AMG Clone (SOLD) - 1978 280CE (SOLD) - 1983 300D (SOLD) - 1981 300D (SOLD)

The grommet does not need to be glued. It just sticks in place. The "diaper" is a great idea (if I do say so myself ). The diaper is "sacrificial" in that it also rots but is easy and cheap to replace. The material for the diaper is the kind of rubber sheeting that garden shops sell for lining back-yard ponds. You may be able to pick up scraps for free from an installer.

I have also searched (so far unsuccessfully) for a non-rotting diaper material. The existing stuff works well enough and preserves the grommet so that the remaining problem (replacing the diaper) is such a tiny problem that I just didn't get very much worked up about finding a better material.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I've been replacing the grommet once a year thanks to ULSD

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K