300E 4MATIC (124.230) L6-3.0L (103.985) (1990)
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Overvoltage Protection Relay: Description and Operation
300 E/Series
Fuel System Components
The overvoltage protection relay prevents damage to the CIS-E control unit from excessive voltage which may occur when vehicle components are
switched on and off or in the event of an overcharge to the vehicle battery.
