Keeping passengers and drivers safe on the road is a top priority both for them and for us. Due to this, automobile manufacturers develop technologically advanced protective systems.
The Mercedes community founded the “PRESAFE System” as one of its programs. With this function, you will be protected from any risks on the road as well as those around you.
According to the table below, Mercedes has installed or made “Mercedes Pre-Safe Functions Limited” available for these models:
Table
| Mercedes-Benz C-Class | Mercedes-Benz S-Class |
| Mercedes-Benz E-Class | Mercedes-Benz CLA |
| Mercedes-Benz GLA | Mercedes-Benz CLS |
| Mercedes-Benz SL & SLC | Mercedes-Benz GLC X253 |
| Hatchback C253 Coupe SUV | Mercedes-Benz GLS X164 X166 |
| Mercedes-Benz GLE MLW166 C292 SUV |
What Does A PRESAFE Function Mean?
PRE-SAFE® is the vehicle’s system for preparing itself for an impending collision. Sensors ensure the safety of your vehicle’s occupants automatically through the use of different measures.
Mercedes Pre-Safe Functions Limited: Causes
What Are The Features Of A Pre-safe Mercedes-Benz?
Accidents are prevented and their consequences are reduced by pre-safe systems. As a result of that function, the driver’s actions are tracked as well as the vehicle’s behavior.
When there is any possibility of a car accident or loss of control, this vehicle will take the following preventative actions:
- Rollovers prevent large debris from entering the vehicle by automatically closing the windows and sunroof. Therefore, passengers won’t be able to roll up their windows because windows don’t close on their fingers.
- The brakes in the calipers increase the brake pressure, increasing the vehicle’s braking power and stopping ability. It is imperative that the car slows down as much as possible as a result of taking this action.
- The vehicle will reposition the backrests during braking to ensure that the passenger is well supported against the seat. Seat belts will be tied up during braking to ensure that the passenger is secure against the seat. It is through these functions that the body will be placed in a favorable position in the event of an unlucky crash.
- A system that activates hazard lights automatically when braking is in operation. By taking this action, any drivers behind the vehicle are alerted to the sudden stop they are about to encounter.
- Lastly, during a crash, the vehicle’s audio system automatically generates a powerful buzzing sound to prevent hearing damage from loud noises.
All of these features are designed to protect vehicles against potential impacts. As a result of these matrixes, both the driver and the passengers are less likely to suffer injuries in an accident.
Vehicles that have Pre-Safe Brake feature are an important safety feature. This safety feature automatically applies brakes to prevent or decrease the chance of an accident if the driver does not react immediately when the brakes are applied.
What Is PRESAFE® Sound?
A sound, called the Pre-Safe sound in Mercedes, is activated by your vehicle when an unavoidable collision is detected. There is a short intrusion signal called “pink noise” or “pink sound” which is played through the vehicle’s sound system in such circumstances.
What Is PRESAFE® Brake?
With PRE-SAFE® Brake, vehicles will be able to identify critical situations quickly in the event of an emergency. Radar sensors assist in this process. For about one and a half seconds, the car applies a partial brake if it continually develops a critical situation without the driver reacting.
How Does The PRE-SAFE® Safety System Work?
In addition to drivetrain safety systems, several other vehicle safety systems are involved in this advanced protection system. In order to operate efficiently, it collects all the information it needs from these systems.
An automatic panic braking detection system continuously monitors inputs and drivers for signs of panic braking. An unexpected and sharp release of the throttle and slamming of the brakes causes this to happen.
As well as assessing the signs of potential accidents caused by skidding and sliding, it is important to look for the signs of an impending crash. A pre-safe system utilizes wheel speed sensors and data from the ABS/ESP system in Mercedes vehicles.
In addition to the forward-facing cameras and radars in their windshields, PRESAFE receives perception data from the forward-facing cameras and radars.
A system that gathers and analyzes extensive data from these sources will be able to identify potential issues or obstacles in advance, as well as take immediate action when they arise.
Why Does This Warning Message Occur On The MB Dash?
A safety-critical system like Pre-Safe involves a large amount of complexity. It is important that all components work optimally and successfully, since even the slightest irregularity can impact overall performance.
A warning message will appear on the vehicle if any malfunction might affect pre-safe functions. The following are the most relevant causes:
The code of control software can be affected by bugs or contain affected functions. A large percentage of the time, the software inputs from different sensors seem implausible and not capable of handling real-life situations in the most demanding manner.
In the event that the ABS or ESP systems malfunction, Pre-Safe’s function and features will be compromised. A faulty wheel speed sensor or a malfunctioning ESP control unit might be a cause for concern.
It is possible for that operation to occur while driving in rugged or harsh conditions. There is a possibility that the function will be affected by adverse conditions such as heavy downpours or snow. It is also possible to have these problems as a result of an unprofessional windshield replacement.
How To Reset Pre Safe Mode On Mercedes?
In order to reset that function on your Mercedes, you should follow these steps:
The Pre Safe button should be pressed and held for a few seconds, then released. Whenever you see the warning message on the dashboard, contact a professional for assistance. Detection of irregularities in Mercedes models is handled by a network of sensors.
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Frequently Asked Questions
Why is my PRESAFE not working?
It is often the result of dirty sensors that causes this notification. It is necessary to clean the front sensors of your vehicle in order for it to work properly.
What causes most of that system?
Sensors may be positioned incorrectly, batteries may be weak, or seat belt switches may be defective, which may result in this message. The exact cause of the problem should be identified using a diagnostic tool.
How do I clear a Mercedes fault code?
In order to apply this technique, you need to clear the fault code. On the left side of your vehicle’s instrument cluster, you will find a reset button. When the display indicates “To rest: Press reset button for 3 seconds”, press and hold the button. Reset the device by pressing the reset button again until the display reads “system has been reset”.
Conclusion
In this section, we’ve covered Mercedes Pre-Safe functions limited, a message that leads to an overall improvement in the vehicle’s safety. By doing so, it reduces the likelihood of cars colliding or prevents them from occurring.
It uses systems and hardware, such as SRS/ABS/ESP, forward-facing cameras, radars, and others, to execute several actions. PRESAFE functions and their performance will also be impacted by any failures or issues within these systems.