P0578 MERCEDES-BENZ – Cruise Control Multi-Function Input ‘A’ Circuit Stuck

P0578 MERCEDES-BENZ Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light),Cruise control system inoperative

P0578 MERCEDES-BENZ Possible Causes

Faulty Cruise Control Function Switch,Cruise Control Function Switch harness is open or shorted,Cruise Control Function Switch circuit poor electrical connection

P0578 MERCEDES-BENZ Description

The Engine Control Module (ECM) monitors the Cruise Control Multi-Function Input ‘A’. The ECM sets the OBDII code when the Cruise Control Multi-Function Input ‘A’ is not to factory specifications.