W123, Body

'83 300SD Missing switch above domelight?

I've been working on getting my '83 300SD back to fighting fit and I'm beginning to move on to cosmetic issues now. One thing that has been driving me nuts is a hole in the headliner, not a cigarette burn, but one that was made into it. It's about an inch square and has has molded, rounded edges. It's about an inch above or aft of the domelight. My SD has a sunroof, but the switch for that is in the cluster above the climate controls. Can anyone tell me what this hole is for?

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Injector crush washer centers missing? 300TD '85

A couple of months ago I replaced my injectors with new crush washers. Now, after a compression test & valve adjustment the centers of two of the washers were missing (and one was broken, about to fall out!) The injectors were torqued with a true torque wrench to the right amount. Where did those centers go? Did they simply disintegrate like happened in my '78 diesel VW or are they destroying my engine? Unfortunately I also have a new noise at certain RPMs and when shutting down.

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