I agree with Manny.

But in reguard to the cluster interpreting which sensor. The ECL has a normal resistance of 105-120 ohms. The windshield wiper fluid level switch has a normal resistance of 145-185ohms. So with all levels OK the cluster sees from 250 - 305ohms for the series circuit. When either level goes low the switch shorts and goes to 0 ohms. Since the resistance is in series the resistance of the switch at proper level is left to be read. In other words if the ECL switch sees low coolant it goes to 0 ohms and the series circuit now reads 0 + 145 to 185 ohms. The cluster see the resistance and recognizes the coolant level is low.

Another unique situation is where the sum total doesn't fit any of the situations. In this case a text display comes up stating something like "error in display".

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