Item 89 in the image on the right, above. I noticed it in the parts list for engine mount hardware in the PP catalog and wasn't sure if it was needed, or applicable.

FWIW, I believe the shock mount in my car does match the image on the right. I'll look again, but I studied it from above earlier today.

Sounds like I'll just be needing to order the 2 engine mounts. I have selected Lemforder, should be great. I'm actually excited to do this job.

Question- would the OFH gasket job (I have the MB waffle) be any easier with the engine rocked back while doing the engine mounts?

FSM job 18-110 removal and installation of oil filter

Yes, raising the engine can help to gain better access to some of the hex head bolts mounting the housing to the block.
Some have dropped the steering box instead of raising the engine.
First, clean the hex heads thoroughly with brake cleaner and cotton swabs.
The allen socket or allen wrench needs to be all the way in the hex head to remove the bolt.
Otherwise you'll have the tool slip and damage the bolt.

Hint:

To remove the oil cooler lines from the filter housing spray the fittings with penetrant first.
Then use a thin 24 mm open end wrench (Park brand bicycle cone wrench or equivalent) as a counterhold on the oil filter line nipple and a 27 mm open end wrench (or flare wrench if you have one that size) on the oil line fitting.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

I believe you have the newer engine shock mount method shown as on the right of the drawing in the link and the enlarged diagram below.
Check to see if that is what is in place, before you decide to order any of the engine shock system parts.



Item 29 is the rubber fused to metal shock mount that tends to fail (123-241-48-13), and that's the costly one.
Item 65 is the repair kit (123-586-06-24) which is reasonable in cost.
The kit may have changed as the diagram seems to have some additional components that are not in the PP kit, and there is no bolt in the diagram either.

If the rubber/metal engine shock mount is shot, I wouldn't get the repair kit nor the rubber/metal shock mount.
Removing, replacing or keeping worn engine shocks and mounts in their current location won't affect the idle smoothness.
Again, IMHO not an essential system, I naively replaced them on my first MB (an 83 W123 300D), and it made no difference except for emptying my wallet.

For the OFH (Oil Filter Housing) to engine block gasket, only get the original MB waffle weave gasket (616-184-07-80)...accept no substitutes.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

The motor mounts make a big difference in the vibrations. To get more life out of cheaper India mounts (DEA, Anchor, forget), I filled them w/ polyurethane, plus a backer plate beneath to support the poly. This gave increased cabin buzzes noticeably (cig lighter door, vents, etc) and even worse gave a low-frequency vibration coming off idle (~1200 rpm) which was especially bothersome driving around parking lots. It felt like an old carbureted gas engine that would stumble off idle, ready to die.

In my 1985 300D, I recently went back to unfilled mounts, using one I had marked "Made in Germany" (couldn't make out stamp) and bought another for ~$40 shown in the photo. I recall a past post which said these were from the same stock as $100 ones and they had to grind off a brand mark to sell them (see photo). Normally beyond my cheap-bastard price range, but turned out they were worth it. Now it is like driving a different car it is so much smoother. I still get a slight shaking around 2000 rpm, but that isn't a region I spend much time at under throttle. The final story will be if both mounts last for 10 yrs.

Other info - the poly fill was still soft and could be pushed in 1/2" by thumb so kind of amazing it made so much difference. The poly was pushing on the backer plate because some extruded thru some holes. The engine is quiet idling, almost so you can barely tell it is a diesel from 10 ft away. With all mounts, I didn't notice the engine moving hardly at all relative to the body, but you can feel the vibrations in the cabin.

Attached Thumbnails

 

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans