How to Fix “Collision Prevention Assist Plus Inoperative” on Mercedes

The Collision Prevention Assist Plus system is a crucial safety feature in Mercedes-Benz vehicles. However, it can sometimes display an error message: “Collision Prevention Assist Plus Inoperative.” This issue can be caused by various factors, including sensor damage, electrical faults, or software-related problems. In this article, we will explore the causes, error codes, and solutions to fix this issue.

Causes of Collision Prevention Assist Plus Inoperative

The system failure can result from several factors, including:

• Physical damage: Accidents or impacts can damage the front radar or control module.
• Rodent damage: Wires being chewed by rodents can cause electrical issues.
• Water damage: Flooding or water intrusion (hydrostatic lock) can damage the system.
• Dirty or obstructed radar sensor: Dirt, fog, or ice can block the sensor’s ability to detect objects.
• Faulty control module: A malfunctioning control unit may need repair or replacement.
• Broken wiring or electrical disconnection: Wiring problems can cause communication loss between the radar and the ECU.

Common Diagnostic Trouble Codes (DTCs) on Xentry Diagnosis

When scanning the vehicle using Xentry Diagnosis, the following DTC (Diagnostic Trouble Codes) may appear:

• C10C755 – Coding error
• C10C7FB – Faulty module that requires replacement
• B1C3200 – Vehicle accident damage; requires replacement of the control unit
• B210E00 – Electrical circuit error causing loss of power to the control module
• B220600 – Incorrect VIN in the control module; requires reprogramming

Methods to Fix “Collision Prevention Assist Plus Inoperative”

There are two main ways to fix this issue:

Method 1: Repairing and Reprogramming the System

This method involves identifying the cause and fixing the faulty components.

Step 1: Diagnose the Issue

• Use Xentry Diagnosis to read fault codes and determine the root cause of the error.

Step 2: Identify and Replace Faulty Components

• Based on the DTC codes from Xentry, locate the faulty part (sensor, wiring, or control module).
• Replace any damaged components.

Step 3: Coding and Programming

• Use DTS Monaco or Vediamo to reprogram and code the new parts to the vehicle’s system.

Step 4: Clear Error Codes

• Use Xentry Diagnosis to reset the error codes.

Step 5: Test Drive

• Restart the vehicle and test the system to ensure everything functions correctly.

✅ Advantages: This method fully restores the Collision Prevention Assist Plus feature, making the vehicle as safe as before.

❌ Disadvantages: It is an expensive solution because it may require replacing costly components and software reprogramming.

Method 2: Disabling the “Collision Prevention Assist Plus Inoperative” Warning

If you prefer to avoid costly repairs, you can disable the warning instead of fixing the system.

✅ Advantages: This method is much cheaper and faster than full repairs. It saves 90% of the cost compared to replacing faulty components.

❌ Disadvantages: Disabling the warning means you lose the Collision Prevention Assist Plus feature, which can reduce the vehicle’s safety.

➡️ For detailed instructions, read our article: “How to Turn Off the ‘Collision Prevention Assist Plus Inoperative’ Warning on a Mercedes“.

Conclusion

The “Collision Prevention Assist Plus Inoperative” error can be resolved in two ways:

1. Repair and reprogram the system to restore its original functionality.
2. Disable the error message if you prefer a cost-effective solution.

If you need professional assistance with diagnostics, coding, or programming, AutoExplain is here to help.

📲 Contact us via WhatsApp at +84967469410 for expert support! 🚗💻