Hi John-Ha,
thanks for your 2 replies to my 2 xenon light sensor problems.
On the second failure I tried to make one good sensor out of the wreckage of the first two, but failed. As you observe, the joints in the linkage eventually got full of muck, stiff, seized up, so something had to give. These cars are not designed to last 18 years, more like 7. The front sensor failed through old age, first the joints seized up, then cable ties achieved a couple more years, then the joints simply broke. An e-bay replacement corrected things.
I broke the rear sensor after refitting the driveshafts. This one was harder to remove and replace than the front one, and the e-bay replacement came with seized joints, which I carefully freed with 3 in 1 oil and gentle manipulation. Exposed as they are to mud and water it's a miracle they last as long as they do.
I do think they note relative, not absolute, position. I do not see any adjustment on them, and over the years things change. It's asking a lot for the motorised headlights to chase the suspension movements from 2 separate sensors as I bounce along a rocky track at speed.
I own 2 2000 Omega CDX estates, one PFL, one FL. the PFL has simple twin filament bulbs, the FL xerox dipped and tungsten main beams. The FL is not vastly superior.
Thanks for your tip on containing the operating lever. I have not yet known one fall out, if it does I know what to do.