W126 list of engine sensors, stuff to test?

[LandYaghtLover]

Asking to be spoon fed here I am having an issue, I think, with my throttle valve switch. According to my X11 adjustments for lambda, my switch is likely faulty.

So I am wondering what other sensors and stuff I should test on the engine. I am very used to a Ford 4.6 with a cam and crank sensor, IAT, IAC and a few temp sensors, etc. But on the 560 SEL I do not have a laundry list of sensors to replace and test as part of maintenance. Such as if there even is a cam sensor.

Any help would be great, I can look-up the test procedures myself most likely. Just need a starting point on what is all there.