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Home >> Mercedes Benz >> 1988 >> 420SEL >> Repair and Diagnosis >> Engine Performance >> System >> Cis-E System >> Operation >> Idle Speed Control Unit
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Idle Speed Control Unit

The idle speed control unit processes the following information: engine speed, coolant temperature, idle speed signal (throttle valve switch), vehicle speed signal (speedometer), automatic transmission shift lever position and A/C compressor cut-in signal.