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What's the matter with the Mercedes-Benz protection system malfunction?

2 Answers

MacElle

09/04/25 5:09am

Mercedes-Benz protection system malfunction may be caused by damaged airbags. Other possible causes of the malfunction: Damaged seat belt sensor; Damaged airbag sensor; Anti-towing system issue; Vehicle battery depletion; Spark plugs being flooded. It is recommended to remove the spark plugs, disconnect the fuel injector fuse, start the vehicle to drain the raw fuel, clean and heat the spark plugs, reinstall the spark plugs and fuse, then start the vehicle to test. If there are any fault codes, clear them. Safety Protection System: Mercedes-Benz's PRE-SAFE is a preemptive safety system, also known as the pre-safety protection system. PRE-SAFE is a preventive safety protection system that activates when an accident is imminent, ensuring the safety of vehicle occupants. It was first applied in Mercedes-Benz's flagship S-Class sedan, and later models like the CL-Class coupe and E-Class also adopted this system. PRE-SAFE can be said to have created a new era in safety protection systems, coordinating the harmonious operation of both active and passive vehicle safety systems. Based on danger signals from the active safety system sensors, such as vehicle skidding or heavy braking, PRE-SAFE can assess the dangerous situation within milliseconds and activate the actuators, preparing for an imminent collision with comprehensive protection for the occupants.

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MacEmery

09/16/25 6:09am

That day while repairing a car, I came across a Mercedes with the airbag warning light on. The most common issue with the PRO-SAFE system malfunction is a loose sensor connector under the seat. The owner might have installed floor mats themselves, which could have pulled on the wiring harness, or spilled drinks leading to oxidized connectors. Last time, I also encountered a case where the system locked the protective function after a minor front collision without replacing the sensor. Never randomly unplug connectors for such faults; you need to use a diagnostic tool to check the specific error codes. Some older models are prone to false alarms in rainy weather, which may disappear after driving for a while, but if the light stays on continuously, it's advisable to get it checked immediately. If an accident occurs and the airbags fail to deploy, it could be a serious problem.

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How Often Should the Battery of a Haval H6 Be Replaced?

The service life of the Haval H6 battery is 2-3 years, and the original battery of a new car can last more than 3 years. The following are specific classifications of car batteries (also known as storage batteries): 1. Ordinary battery: The plates of an ordinary battery are made of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; the disadvantages are low specific energy (i.e., the amount of electrical energy stored per kilogram of battery), short service life, and frequent daily maintenance. 2. Dry-charged battery: Its full name is dry-charged lead-acid battery. Its main feature is that the negative plate has a high storage capacity. In a completely dry state, it can preserve the obtained power for two years. When in use, you only need to add electrolyte and wait for 20-30 minutes before it can be used. 3. Maintenance-free battery: Due to the structural advantages of maintenance-free batteries, the consumption of electrolyte is very small, and it basically does not need to replenish distilled water during its service life. It also has the characteristics of shock resistance, high temperature resistance, small size, and low self-discharge. The service life is generally twice that of ordinary batteries.

What is the maximum age for driving with an AB driver's license?

Holders of A or B driver's licenses who are over 60 years old must apply to replace their licenses with ones that permit driving small cars or small automatic transmission vehicles, and the license will not be automatically downgraded. Below are the relevant details: 1. According to the 'Regulations on the Application and Use of Motor Vehicle Driver's Licenses': Article 59 states that individuals aged 60 or above are not allowed to drive large buses, tractors, city buses, medium-sized buses, large trucks, trolleybuses, or trams; holders of licenses for large buses, tractors, city buses, medium-sized buses, or large trucks must go to the vehicle management office at the place where the driver's license was issued or another location to replace their licenses with ones that permit driving small cars or small automatic transmission vehicles. 2. For downgrading: When going to the vehicle management office for downgrading, the required materials include the applicant's ID card, a copy of the ID card, and a white-background photo. Additionally, it is necessary to visit the driver's service window at the place where the A2 license was issued, inform the traffic police staff of the need to apply for an A2 downgrade, and choose between a C1 or C2 driver's license based on personal needs.

What is the fitting clearance between the connecting rod and the crankshaft?

The diameter of a passenger car crankshaft is generally around 6-7 cm, with a clearance of 0.04±0.01; the diameter of the connecting rod is generally around 4-5 cm, with a clearance of 0.03±0.01. The exact data may vary depending on the specific vehicle model, and accurate data can be found in the relevant vehicle's repair manual. Here is the relevant introduction: 1. Connecting rod and crankshaft clearance: A certain clearance between the engine's crankshaft and connecting rod is a necessary condition for its normal operation, as the crankshaft will expand due to temperature rise during operation and have some axial movement. The reserved clearance ensures it can still operate normally after expansion. However, this clearance should not be too large. If the reserved clearance is too large, abnormal axial movement of the crankshaft and connecting rod will occur during engine operation, leading to faults such as piston deflection and connecting rod bending. 2. Indicator: The assembly clearance of the crankshaft and connecting rod, as an important indicator during the assembly process, must be strictly monitored. Whether it is manual assembly or assembly line production, necessary measures will be taken to measure the crankshaft and connecting rod clearance, troubleshoot products with unqualified clearance, and ensure the clearance is qualified before proceeding to the next production step.

What does a half circle with an exclamation mark indicate as a fault?

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What are the new regulations for driving semi-trailers during the A2 probationary period?

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Should the 3rd Generation Haval H6 Use 92 or 95 Octane Gasoline?

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