The rest of that stuff is water. Useless on the headlights. I would go ahead and try the 91%, or 99% isopropanol if you can find it local. It will strip paint! But your headlights should have a polycarbonate cover. Isopropanol should clean it.
Unfortunately, some "fixes" written by manufacturers do not include the years of exposure to weather, heat/cooling cycles and a myriad of chemicals. Perhaps you may end up buffing the area with some auto lamp buffing compound.


snapped_bolt

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'81 240D For now, a good place to borrow new parts
'80 300TD Probably will be put back into service!
'79 240D BACK IN SERVICE SINCE 09/16; limited use, oil leak. Guide pin r/sealed/replaced. Still a leak. Front crank seal....