Have these poor parts designers never heard the words "hermetically" and "sealed"??? Sometimes German parts manufacturers make me crazy.
German car electronics are like American car interiors - they get them all wrong.
Look at the size of those components. Discrete resistors at 68 ohms as well as a diode all on a single-layer PCB? That thing looks like it was designed in the 1970's!
I'm surprised there aren't any vacuum tubes in these babies.