If you’re driving a Mercedes-Benz and the Pre-Safe system has been activated, you may be wondering how to reset it. The Pre-Safe system is a safety feature that helps to protect occupants in the event of a collision. It can activate automatically in certain situations, such as when the car is braking heavily or when it detects a potential collision. When Pre-Safe is activated, several things happen. The seatbelts are tightened, the windows are closed, and the brakes are applied. This helps to ensure that the occupants are in the best possible position to withstand a collision.
In most cases, the Pre-Safe system will reset itself automatically after a few seconds. However, in some cases, you may need to reset it manually. To do this, follow these steps:
1. Turn off the ignition.
2. Wait for 10 seconds.
3. Turn the ignition back on.
The Pre-Safe system should now be reset. If you are still having problems with the system, you should take your car to a Mercedes-Benz dealer for service.
Disabling Pre-Safe Mode
Pre-Safe Mode is a safety feature that activates when the vehicle senses an impending collision. It tightens the seatbelts, closes the windows, and takes other measures to protect the occupants.
Steps to Disable Pre-Safe Mode
- **Start the vehicle and put it in Park.** Ensure the vehicle is parked on a level surface and the parking brake is engaged.
- **Locate the Pre-Safe button on the dashboard.** It is typically located on the center console near the gear selector or on the steering wheel.
- **Press and hold the Pre-Safe button for approximately 10 seconds.** The Pre-Safe indicator light on the dashboard will turn off, indicating that Pre-Safe Mode has been disabled.
Note that disabling Pre-Safe Mode does not turn off other safety features, such as airbags or ABS. It only deactivates the system that prepares the vehicle and occupants for an impending collision.
Step-by-Step Reset Procedure
1. Locate the Pre-Safe button:
- In most Mercedes models, the Pre-Safe button is located on the center console, near the gear selector.
2. Deactivate Pre-Safe:
3. Reset the Pre-Safe system:
- Turn off the ignition and wait for the system to shut down completely.
- Disconnect the negative terminal of the battery. Wait at least 10 minutes for the capacitors to discharge.
- Reconnect the negative terminal of the battery.
- Turn on the ignition and check if the Pre-Safe light is off. If it is, the reset was successful.
| Warning |
|---|
| Do not disconnect the battery while the ignition is on, as this could damage the electrical system. |
Identifying the Pre-Safe Button
The Pre-Safe button is typically located near the center console, often beside the hazard light button. It is usually marked with a symbol that resembles a car with a circle around it. In some Mercedes models, the Pre-Safe button is integrated into the dashboard or steering wheel.
Locating the Pre-Safe Button in Different Mercedes Models:
| Model | Button Location |
|---|---|
| E-Class (W213) | Center console, next to the hazard light button |
| S-Class (W223) | Integrated into the dashboard, above the climate control vents |
| GLE (W167) | Steering wheel, on the right-hand spoke |
| GLS (X167) | Center console, next to the drive mode selector |
Locating the Reset Switch
The location of the reset switch can vary depending on the Mercedes model and year. In general, it can be found in one of the following locations:
1. Under the hood: Open the hood and look for a small black or red button labeled “Reset” or “Pre-Safe Off.” It may be located near the battery or the firewall.
2. Inside the glove compartment: Open the glove compartment and check the inside panel. There may be a small button or switch labeled “Reset” or “Pre-Safe Off.”
3. Under the steering wheel: Look beneath the steering wheel column. There may be a small button or switch labeled “Reset” or “Pre-Safe Off.”
4. In the center console: Some models have a reset switch located in the center console, near the gear selector or other controls. It may be concealed behind a small panel or flap.
Additional Details for Locating the Reset Switch in the Center Console:
- For Mercedes-Benz C-Class (W205/S205): The reset switch is located in the center console, behind the COMMAND system controller knob. Remove the knob by pulling it straight up. The reset switch will be visible beneath the knob.
- For Mercedes-Benz E-Class (W213): The reset switch is located in the center console, next to the KEYLESS-GO start button. It is concealed behind a small rubber flap. Lift the flap to access the switch.
- For Mercedes-Benz S-Class (W222): The reset switch is located in the center console, behind the COMAND controller. Remove the controller by pressing the release button and pulling it straight up. The reset switch will be located beneath the controller.
Safety Precautions
Before performing any maintenance or troubleshooting procedures on your Mercedes vehicle, always take the following safety precautions:
1. Park the Vehicle Safely
Park your vehicle on a level and stable surface, engage the parking brake, and turn off the engine.
2. Disconnect the Battery
Disconnect the negative terminal of the battery to prevent any electrical accidents.
3. Wear Protective Gear
Use appropriate protective equipment such as gloves, safety glasses, and coveralls to protect yourself from potential hazards.
4. Use Proper Tools
Ensure you have the necessary tools and equipment to safely perform the procedure.
5. Avoid Extreme Temperatures
Do not perform any maintenance or troubleshooting during extreme weather conditions, as it can affect the vehicle’s systems. If possible, work in a temperate environment or avoid working on the vehicle during peak hours of heat or cold.
Additionally, if you are unsure about any of the procedures or have limited automotive knowledge, it is highly recommended to seek professional assistance from a qualified mechanic.
Troubleshooting Common Issues
1. System Not Responding
If the Pre-Safe mode system is not responding, try the following:
- Check the fuses and ensure they are in good condition.
- Inspect the wiring harness for any damage or loose connections.
- Restart the vehicle to reset the system.
2. Sensors Malfunctioning
If the sensors are malfunctioning, the Pre-Safe mode system may not function correctly. Try the following:
- Clean the sensors to remove any debris or obstructions.
- Check the sensor connections for any loose or damaged wires.
- Calibrate the sensors using a diagnostic tool.
3. Software Errors
Software errors can occasionally occur, affecting the Pre-Safe mode system. To address this, try the following:
- Update the vehicle’s software to the latest version.
- Reset the Pre-Safe mode system by following the steps outlined in the user manual.
4. Incorrect Vehicle Settings
Incorrect vehicle settings can disable the Pre-Safe mode system. Verify that the following settings are correctly configured:
- Pre-Safe is activated in the vehicle’s menu.
- The vehicle’s driving mode is set to “Comfort” or “Sport”.
5. Mechanical Component Failure
Rarely, a mechanical component failure can affect the Pre-Safe mode system. If you suspect a mechanical issue, seek professional assistance from a qualified mechanic:
6. Advanced Troubleshooting for Persistent Pre-Safe Mode Issues
If the above steps do not resolve the persistent Pre-Safe mode issues, consider the following advanced troubleshooting procedures:
- Use a Diagnostic Tool: Connect a diagnostic tool to the vehicle’s computer system to identify any error codes or system issues.
- Check the Brake Switch: A faulty brake switch can interfere with the Pre-Safe mode system. Inspect the brake switch and connections for damage or malfunctions.
- Examine the Yaw Rate Sensor: The yaw rate sensor plays a crucial role in detecting lateral acceleration. Inspect the sensor and its connections for any damage or loose wires.
- Calibrate the Pre-Safe Mode System: Using a diagnostic tool, perform a Pre-Safe mode system calibration to ensure accurate sensor readings and proper system functioning.
How to Reset Pre-Safe Mode in Mercedes
Pre-Safe mode is a safety feature in Mercedes-Benz vehicles that activates in anticipation of an impending collision. It can be reset using the following steps:
1. Turn on the Ignition
Insert the key into the ignition and turn it to the “ON” position, but do not start the engine.
2. Access the Instrument Cluster
Use the arrow keys on the steering wheel to navigate to the “Settings” menu on the instrument cluster.
3. Select “Vehicle”
Scroll down to the “Vehicle” option and select it.
4. Choose “Pre-Safe”
In the “Vehicle” menu, find the “Pre-Safe” option and select it.
5. Disable Pre-Safe
Toggle the “Pre-Safe” setting to “Off” using the arrow keys.
6. Confirm Reset
Select “OK” to confirm the reset and disable Pre-Safe mode.
Alternative Reset Methods
In addition to the above steps, there are alternative methods to reset Pre-Safe mode in Mercedes vehicles:
1. Disconnect the Battery
Disconnect the negative battery terminal for a few minutes, then reconnect it to reset the Pre-Safe system.
2. Use a Diagnostic Scanner
Connect a diagnostic scanner to the vehicle’s OBD-II port and use it to disable Pre-Safe mode.
3. Contact Mercedes-Benz Service
If you are unable to reset Pre-Safe mode using the above methods, contact Mercedes-Benz service for assistance.
4. Reset Using the Fuse Box
Locate the fuse box under the hood and remove the fuse responsible for the Pre-Safe system for a few minutes. Reinstall the fuse to reset Pre-Safe mode.
**Fuse Location:**
| Type of Fuse | Location |
|---|---|
| 15-amp fuse | Fuse box in the engine compartment |
5. Perform an Emergency Stop
Brake hard to trigger an emergency stop and deactivate Pre-Safe mode. This method should only be used in an emergency situation.
6. Turn Off the Pre-Safe System
Some Mercedes models have a physical button to turn off the Pre-Safe system. Locate this button and press it to disable Pre-Safe mode.
7. Use the Navigation System
For certain Mercedes models equipped with navigation, you can reset Pre-Safe mode through the navigation system. Access the “Settings” menu, navigate to the “Vehicle” section, and select “Pre-Safe” to disable it.
Vehicle Compatibility
Pre-Safe mode is an advanced safety feature available on select Mercedes-Benz models. It prepares the vehicle and occupants for potential collisions by tightening seatbelts, adjusting headrests, and closing windows. If your vehicle has Pre-Safe mode and it becomes disabled, you can reset it using the following steps. However, it’s important to note that not all Mercedes-Benz models are equipped with Pre-Safe mode, so it’s crucial to check your vehicle’s manual or consult your dealership for compatibility.
The following Mercedes-Benz models are equipped with Pre-Safe mode:
| Model | Year |
|---|---|
| A-Class | 2019-Present |
| C-Class | 2015-Present |
| E-Class | 2017-Present |
| S-Class | 2014-Present |
| GLE | 2016-Present |
| GLS | 2017-Present |
| G-Class | 2019-Present |
If your vehicle is not listed in the table above, it may not be equipped with Pre-Safe mode. To confirm compatibility, consult your vehicle’s owner’s manual or contact your local Mercedes-Benz dealership.
How to Reset Pre-Safe Mode Mercedes
Pre-Safe is a safety system in Mercedes-Benz vehicles that activates in anticipation of an imminent collision. It can tighten seatbelts, close windows, and adjust the suspension to prepare occupants for the impact. Resetting Pre-Safe mode may be necessary after a collision or if the system malfunctions.
Potential Risks and Benefits
Risks:
- Pre-Safe mode may not activate in all collision scenarios
- Resetting Pre-Safe mode may disable the system until it is recalibrated
- Improperly resetting Pre-Safe mode could affect the vehicle’s safety features
Benefits:
- Resetting Pre-Safe mode can restore the system to its default settings
- It can fix system malfunctions that prevent Pre-Safe from activating correctly
- Resetting Pre-Safe mode after a collision can ensure that the system is fully operational
Steps to Reset Pre-Safe Mode:
- Turn off the ignition engine.
- Disconnect the negative battery terminal.
- Wait 30 seconds.
- Reconnect the negative battery terminal.
- Start the ignition engine.
- Drive the vehicle for at least 10 minutes to allow the Pre-Safe module to recalibrate.
- Check the Pre-Safe system status in the vehicle’s settings menu.
- Ensure that all Pre-Safe components are functioning properly (e.g., seatbelt pretensioners, window closers, suspension adjustment).
- Consult with a qualified Mercedes-Benz technician if any issues arise or if you are unsure about any of the steps.
| Step | Action |
|---|---|
| 1 | Turn off the ignition engine. |
| 2 | Disconnect the negative battery terminal. |
| 3 | Wait 30 seconds. |
| 4 | Reconnect the negative battery terminal. |
| 5 | Start the ignition engine. |
| 6 | Drive the vehicle for at least 10 minutes. |
| 7 | Check the Pre-Safe system status. |
| 8 | Ensure that all Pre-Safe components are functioning properly. |
| 9 | Consult with a qualified Mercedes-Benz technician if necessary. |
Disconnect the Battery
Disconnect the negative terminal of the battery for at least 10 minutes. This will reset the car’s electrical system, including the Pre-Safe system.
Use a Diagnostic Tool
Connect a diagnostic tool to the car’s OBD-II port. This will allow you to access the Pre-Safe system and reset it.
Perform a Hard Reset
Turn the ignition key to the “Off” position.
Turn the ignition key to the “On” position, but do not start the engine.
Wait for the “Pre-Safe” warning light to go out.
Turn the ignition key to the “Off” position.
Wait 10 seconds.
Turn the ignition key to the “On” position.
Start the engine.
Drive the Car
Drive the car for at least 30 minutes. This will allow the Pre-Safe system to recalibrate itself.
Professional Assistance Considerations
Professional Assistance Considerations
If you are unable to reset the Pre-Safe system yourself, you may need to seek professional assistance. A qualified mechanic can help you diagnose the problem and reset the system properly.
When to Seek Professional Assistance
You should seek professional assistance if:
- You are unable to reset the Pre-Safe system yourself.
- The Pre-Safe warning light remains illuminated after you have reset the system.
- You notice any other problems with the Pre-Safe system.
Benefits of Professional Assistance
Professional assistance can provide the following benefits:
- Accurate diagnosis of the problem.
- Proper reset of the Pre-Safe system.
- Peace of mind knowing that the Pre-Safe system is working properly.
How to Reset Pre-Safe Mode Mercedes
Pre-Safe mode in Mercedes-Benz vehicles is a safety feature that is designed to activate in the event of an impending accident. The system uses sensors to detect potential hazards and prepares the vehicle and its occupants for a possible impact. Pre-Safe mode can be reset by following the following steps:
- Turn off the engine.
- Press and hold the “Menu” button on the steering wheel for about 10 seconds.
- Select “Settings” from the menu.
- Select “Vehicle” from the settings menu.
- Select “Pre-Safe” from the vehicle menu.
- Select “Reset Pre-Safe” from the Pre-Safe menu.
- Confirm the reset by selecting “Yes” from the pop-up window.
Once the Pre-Safe mode has been reset, the system will be reactivated the next time the vehicle is started.
People Also Ask About How to Reset Pre-Safe Mode Mercedes
What is Pre-Safe mode in Mercedes-Benz vehicles?
Pre-Safe mode is a safety feature that is designed to activate in the event of an impending accident. The system uses sensors to detect potential hazards and prepares the vehicle and its occupants for a possible impact.
How do I know if Pre-Safe mode is activated?
Pre-Safe mode will activate automatically when the vehicle’s sensors detect an impending accident. The system will provide visual and audible warnings to the driver, and it will also make preparations to the vehicle, such as tightening the seatbelts and closing the windows.
Can I reset Pre-Safe mode myself?
Yes, Pre-Safe mode can be reset by following the steps outlined in this article. However, it is important to note that resetting Pre-Safe mode will disable the system until it is reactivated.
