How to Deal with a Clogged Car Radiator?

Why is the recirculation light not on?

Most vehicles have only one button to control the air recirculation mode. Generally, when the light is off, it indicates the current mode is fresh air (outside air) circulation, and when the light is on, it means recirculation mode is active. Some vehicles have two separate buttons for outside/recirculation modes, where the illuminated button indicates the active mode. Here's more information about recirculation and fresh air modes: 1. Fresh Air Mode: This mode draws air from outside the vehicle, directs it through the air conditioning system for heating or cooling, and then blows it out through the vents. Fresh air mode replenishes the cabin with outside air, improving air quality inside the vehicle. However, if the outside weather is extremely hot and dry, using fresh air mode requires the AC compressor to work continuously to cool the incoming hot air, which consumes additional fuel. 2. Recirculation Mode: This mode circulates and reuses the air already inside the vehicle cabin. The AC system draws in cabin air, cools it, and then recirculates it. Once the cabin temperature reaches the set value, the AC compressor disengages, reducing engine load. Therefore, the faster the cabin reaches the desired temperature, the sooner the engine load decreases, resulting in lower fuel consumption.

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Regulations on Annual Inspection Time for 7-Seater Vehicles

According to Article 16 of the "Regulations for the Implementation of the Road Traffic Safety Law": Non-commercial 7-seater vehicles are exempt from inspection within the first six years, require biennial inspections from six to ten years, annual inspections for vehicles over ten years old, and semi-annual inspections for vehicles over 15 years old. Commercial 7-seater vehicles must undergo annual inspections within the first five years and semi-annual inspections thereafter. Required documents for vehicle annual inspection include the vehicle's license, valid compulsory insurance policy, the owner's ID card, and all outstanding traffic violation records must be cleared in advance. Additional notes: Trucks and large/medium non-commercial passenger vehicles require annual inspections within the first ten years and semi-annual inspections thereafter; motorcycles require biennial inspections within the first four years and annual inspections thereafter. Vehicle annual inspection mainly includes the following items: Exterior inspection: Mainly checks vehicle lights, body appearance, suspension, sunroof, tires, whether the lights are functioning normally, any non-working lights, whether the body color has been altered, and if the suspension has been modified. Emission test: Checks whether the vehicle's exhaust emissions meet national standards during high-speed operation. On-line inspection: Primarily examines the vehicle's braking system, headlights, horn, and chassis. Violation check: All traffic violation records must be cleared before the annual inspection to pass. Vehicle annual inspection can be conducted up to 90 days in advance but must not be overdue. According to Article 47, Paragraph 4 of the "Motor Vehicle Registration Management Measures," vehicles that fail to undergo safety technical inspections within the specified period will be subject to warnings or fines by the public traffic management department, and inspections can only proceed after fines are paid. Consequences of failing to undergo annual inspection include: Vehicles that fail to undergo annual inspection on time are not allowed on the road. Driving a vehicle without timely annual inspection results in 3 penalty points and a fine. If an accident occurs involving a vehicle that has not undergone annual inspection, the party involved bears full or primary responsibility, and insurance companies will not compensate. Driving without timely annual inspection is considered illegal and may result in vehicle impoundment.

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What is the difference between 97H and 97V tires?

The differences between 97H and 97V tires are as follows: 1. Different properties: The 97H tire indicates the load index and speed rating of the tire. 97V respectively represents the load index and speed rating of the vehicle tire. 2. Different characteristics: H indicates that the tire can withstand a maximum vehicle speed of 210 km/h. V represents that the maximum speed this tire can withstand is 270 km/h. Extended information is as follows: Tire model such as: 215/70R15, the meanings of these numbers are respectively: 1. 215 indicates the tire section width: the unit is mm, generally the width of the tire is between 145—285mm, with intervals of 10mm; 2. 70 is the aspect ratio: that is, the ratio of the tire sidewall height to the tire section width, 70 represents 70%, generally the aspect ratio of the tire is between 30%—80%, under normal circumstances, ordinary cars should not use tires with an aspect ratio >75%, luxury cars and high-performance sports cars are recommended to use tires with an aspect ratio <60%; 3. R is the abbreviation of Radial: indicating that the tire is a radial structure, 15 is the outer diameter of the rim, the unit is inches.

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What is the penalty for driving at 60 km/h in a 30 km/h speed limit zone?

Driving at 60 km/h on a road with a 30 km/h speed limit constitutes speeding by (60-30)/30*%=100%. Exceeding the speed limit by more than 70% will result in corresponding fines, 12 demerit points, and may also lead to the revocation of the driver's license. For ordinary vehicles outside of highways, the penalties for speeding are as follows: 1. Within 10%: No penalty for exceeding the speed limit by less than 10%. 2. Below 20%: Exceeding the speed limit by more than 10% but less than 20% will result in corresponding fines and 3 demerit points. 3. Below 30%: Exceeding the speed limit by more than 20% but less than 30% will result in corresponding fines and 6 demerit points.

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Why does the GLC always make noise when braking?

There are generally three reasons for the GLC's braking noise: 1. Normal ABS intervention: The sound produced when the ABS system is functioning normally. 2. Insufficient friction: Noise caused by newly replaced brake pads not being properly worn in. 3. Excessive wear: Noise resulting from excessive wear between the brake discs and brake pads. Below is an introduction to related content: ABS working principle: The Mercedes-Benz GLC is equipped with an ABS anti-lock braking system. Its working principle involves a cycle of locking and releasing, keeping the vehicle in a critical state. In this situation, sudden braking will trigger the ABS to intervene, producing abnormal noise, which is considered normal.

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How to Use Urea Solution in Vehicles?

Vehicles use urea primarily to reduce harmful nitrogen oxides in exhaust gases into nitrogen and water. It is generally used in diesel vehicles. There is a dedicated urea tank in the vehicle, where the urea solution is filled. As long as the vehicle is running, urea will be consumed, so it needs to be replenished in time. Typically, about 4 liters of urea is consumed per 100 liters of diesel. The exact amount depends on factors such as engine displacement, model, manufacturer, etc. Different road conditions and load weights can also affect urea consumption. Below is relevant information: 1. Introduction to vehicle urea: The scientific name of vehicle urea is Diesel Exhaust Fluid (DEF). It is commonly used in diesel engines as part of the SCR (Selective Catalytic Reduction) technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition is 32.5% high-purity urea and 67.5% deionized water. 2. Reason for adding urea in diesel engines: Since diesel engines emit polluting nitrogen oxide gases during operation, which are harmful to the atmosphere and human health, prolonged exposure to such gases can cause respiratory diseases. To mitigate the damage to the atmosphere and humans, when urea encounters nitrogen oxides emitted by diesel engines, a chemical reaction occurs, converting the nitrogen oxides into nitrogen and water for emission.

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How to Deal with a Clogged Car Radiator?

Why is the recirculation light not on?

Regulations on Annual Inspection Time for 7-Seater Vehicles

What is the difference between 97H and 97V tires?

What is the penalty for driving at 60 km/h in a 30 km/h speed limit zone?

Why does the GLC always make noise when braking?

How to Use Urea Solution in Vehicles?

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