Cruise Control Multi-Function Input ‘A’ Circuit Stuck
Table of contents
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
How do I fix code P0578 MERCEDES-BENZ?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P0578 MERCEDES-BENZ code
The cost of diagnosing the P0578 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Cruise control system inoperative
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.