I have never heard or either an enrichment solenoid or crossover solenoid. At least not by those terms. There is a cold start valve/solenoid which plays no part in a running motor. The picture of item 5 is partially covered by the number and isn't clear enough for me to state.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician