Looking at the W140 brochure, it says that there are up to 8 control modules in the (forced-air cooled) area ahead of the windshield!

Never did 2-D, my first CAD seat was 3-D/color (Computervision, 1983-ish) and I used it for PC board design, after which I created 3-D models of all of the (SMD) components so that the plastic guys could work around my components. Pretty primitive stuff, wireframe with surfacing capabilities, we had to create any surface other than planar and fillets with calculations and hand-entered formulas.

IIRC around the late '80s we went to Catia, partially because of the capabilities, and partially because 70% of our (automakers) customer base was CATIA.

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Gone to the dark side

- Jeff