P0579 Mercedes-Benz Code - Cruise Control Multifunction Input 'A' Circuit Range/Performance
Quick Answer
The Engine Control Module (ECM) monitors the Cruise Control Multi-Function Input 'A'. Common causes include Faulty Cruise Control Multifunction Switch, Cruise Control Multifunction Switch harness is open or shorted, Cruise Control Multifunction Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0579 Mercedes-Benz indicates Cruise Control Multifunction Input 'A' Circuit Range/Performance.
- Common causes
- Common causes include Faulty Cruise Control Multifunction Switch, Cruise Control Multifunction Switch harness is open or shorted, Cruise Control Multifunction Switch circuit poor electrical connection.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code P0579 Mercedes-Benz Description
What are the Possible Causes of the DTC P0579 Mercedes-Benz?
- Faulty Cruise Control Multifunction Switch
- Cruise Control Multifunction Switch harness is open or shorted
- Cruise Control Multifunction Switch circuit poor electrical connection
How to Fix the DTC P0579 Mercedes-Benz?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0579 Mercedes-Benz code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0579 Mercedes-Benz code?
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Frequently Asked Questions about P0579 Mercedes-Benz Code
1. What are common symptoms of OBDII code P0579 in a Mercedes-Benz related to cruise control multifunction input 'A' circuit range/performance?
- Common symptoms include inoperative cruise control, inability to set or maintain a set speed, and illumination of the cruise control warning light.
2. What are some possible causes of OBDII code P0579 in a Mercedes-Benz?
- Possible causes include a faulty cruise control switch, damaged wiring or connectors in the cruise control circuit, or a malfunctioning cruise control module.
3. How can I diagnose the cause of OBDII code P0579 in my Mercedes-Benz?
- To diagnose the issue, you can start by checking the cruise control switch for proper operation, inspecting the wiring and connectors for any damage, and using a diagnostic scanner to read the specific fault codes stored in the vehicle's computer.
4. Can OBDII code P0579 in a Mercedes-Benz be repaired without professional help?
- Depending on your level of automotive expertise, you may be able to repair the issue yourself by replacing a faulty cruise control switch or repairing damaged wiring. However, for more complex issues involving the cruise control module, professional help may be necessary.
5. What are some tips for repairing OBDII code P0579 in a Mercedes-Benz?
- Tips for repairing the code include checking the cruise control fuse, ensuring all wiring connections are secure, and consulting the vehicle's repair manual for specific diagnostic and repair procedures.
6. Is it safe to continue driving with OBDII code P0579 present in a Mercedes-Benz?
- While the vehicle should still be operable with this code, it is recommended to address the issue promptly to avoid potential safety risks associated with malfunctioning cruise control.
7. How much does it typically cost to repair OBDII code P0579 in a Mercedes-Benz?
- Repair costs can vary depending on the specific cause of the issue and whether professional assistance is required. Generally, costs may range from a few hundred to a few thousand dollars, including parts and labor.
8. Can resetting the OBDII system clear the P0579 code in a Mercedes-Benz?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is recommended to diagnose and repair the root cause of the problem.
9. Are there any preventive measures to avoid OBDII code P0579 in a Mercedes-Benz?
- Regular maintenance checks, including inspecting the cruise control system components and addressing any issues promptly, can help prevent the occurrence of OBDII code P0579 in a Mercedes-Benz.
10. Will OBDII code P0579 cause any other problems in a Mercedes-Benz besides cruise control issues?
- While the primary symptom of this code is related to cruise control functionality, it is possible that other electronic systems in the vehicle may be affected as well. Addressing the underlying issue promptly can help prevent any further complications.
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