Actually this is kinda weird for a M111 car. If you look at the two drawings, X62/12 and x62/13 are two separate VSS signals. The one going from the rear end only goes to N3/4 HFM and a cruise reference resistor N4/2. Only the VSS from the other drawing (front left sensor) goes to CC/ISC controller N4/3 and A1 (inst cluster)

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