What is the issue when PRE-SAFE stops functioning?

[DelLondon]

Normally, when PRE-SAFE stops functioning, it does not affect the vehicle's operation. Here is an introduction to the relevant content: 1. Restart: In most cases, the driver can restore normal operation by turning off the engine and restarting it. 2. Sensor malfunction: If the restart does not work, it may be due to a sensor malfunction. It is recommended to take the vehicle to a 4S shop for inspection and check if the car radar needs cleaning. 3. Camera damage: The camera sensor may be damaged during car washing. Additionally, if a Mercedes-Benz displays PRE-SAFE stop functioning, it could be due to the vehicle's safety protection equipment being turned off, specifically the passenger airbag switch being deactivated. The owner can go to a service station for assistance or manually turn on the passenger airbag, with the switch located on the passenger side.

[StTanner]

Last time I was driving, the Presafe system suddenly stopped working, which made me quite nervous because it's a critical safety feature. Fortunately, I later took it to the repair shop to diagnose the issue. The main culprit could be battery-related—insufficient charge or an aging battery can cause electronic systems, including Presafe, to malfunction since it relies on electricity to trigger seat and window adjustments. Sensor failures are also common; radar sensors behind the windshield may get blocked by dust or insects, leading to misjudgments—I once experienced blurred sensors after rain. Sometimes, the system software acts up and requires an update or reset. While this sounds simple, it's best left to technicians to avoid worsening the issue. A Presafe failure is no minor matter—it compromises pre-collision protection mechanisms—so prompt checks via diagnostic ports or professional servicing are crucial upon detection. Regular maintenance of the vehicle's electronic components is vital; otherwise, other safety features may also fail, given how modern cars rely on interconnected electronic systems to ensure safe driving.

[McKai]

As an avid car enthusiast who frequently tinkers with vehicles, I've studied the Pre-Safe system malfunction several times, and it's mostly caused by electronic issues. A faulty sensor is the prime suspect - false alerts from the front radar or camera can put the system to sleep, like when covered by snow. Control unit failures are also troublesome, requiring specialized tools to read error codes for locating short circuits or software conflicts in the ECU. Poor electrical connections like loose wiring harnesses, especially corroded battery terminals affecting power supply, can be easily fixed by tightening them. Software bugs can usually be resolved through OBD updates. When the preventive safety system shuts down, it increases collision risks since it's responsible for tightening seatbelts to reduce impact. I recommend first checking warning light status and trying a system reboot by disconnecting power if necessary. However, complex issues should be left to authorized shops to avoid damaging other components, given the high repair threshold of electronically integrated vehicles - always assess risks before attempting repairs.

[LaDaniela]

Presafe suddenly stopped working. Safety first, I recommend pulling over for immediate inspection. Possible causes include voltage fluctuations, such as unstable alternator output or battery aging leading to preset function failure; sensor issues like accelerometer or camera obstruction interfering with detection; or software glitches requiring a reset. These all increase accident risks—ignoring them significantly reduces collision protection and impacts the active safety chain. In daily use, keeping front sensors clean and performing regular vehicle maintenance is crucial. If issues arise, seek professional inspection promptly to ensure safety.