BOSCH Cis-E System: Description: Notes

Mercedes-Benz uses a basic CIS injection system for fuel delivery and electronic controls for mixture correction functions.

Electronic controls consist of airflow sensor position indicator (potentiometer), electro-hydraulic actuator, thermo time switch, coolant temperature sensor, Electronic Control Unit (ECU), transistorized ignition system, throttle valve microswitch, altitude sensor, lambda control and oxygen sensor.

If ECU malfunctions, CIS-E system will operate in back-up or "limp-home" mode until fuel system can be repaired.

The EZL electronic breakerless ignition system has computer controlled electronic ignition timing (firing point). Characteristics for various engine load conditions is stored in the ignition control module and can be recalled according to actual engine operating conditions.