While I mentioned electronic control, the engine will run without it. Will be very tough to start- will repeatedly die for about 7 attempts. So even without cold start assistance from those related components, the car should eventually start- if you are getting fuel.

Do a search for 'duke2.6' and 'sears multimeter' to learn more about the KE3 system.

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'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E