What are the reasons for uneven tire wear on the rear wheels of a Mercedes-Benz S-Class?

What Causes Yellowing of Tires? How to Clean Them?

Automotive tire yellowing may be caused by brake pad powder-like metal rust adhering to the tire sidewalls, traces of dust, oxidation and yellowing of tire wax, premature oxidation of tire care products, or premature aging of rubber. When tires turn yellow, it is recommended to use a high-quality hard-bristle brush, citrus degreaser or V3 iron remover, and tire care products for cleaning. Below are the related scenarios: Brake Pad Powder-like Metal Rust: Since brake pads contain iron, they wear down and produce powder during braking. When this powder comes into contact with water, it forms rust water that flows onto the tire sidewalls. Over time, the sidewalls will turn yellow. Traces of Dust: If the tires frequently enter and exit construction sites, the sidewalls are highly prone to yellowing. Without a regular habit of cleaning the vehicle, the tire rubber may absorb a yellowish tint from the dust, which is very difficult to clean. However, this is a normal yellowing condition. Oxidation and Yellowing of Tire Wax: New tires are coated with a layer of tire wax. For vehicles often parked outdoors, the sidewalls are susceptible to yellowing due to the oxidation of tire wax under high temperatures in open-air environments. Another scenario is when low-quality tire wax is used, which may also cause tire yellowing. Premature Oxidation of Tire Care Products: Premature oxidation and yellowing of tire care products is an abnormal phenomenon. In most cases, when tire care products are applied directly without thorough cleaning, it accelerates their oxidation, leading to yellowing. Premature Aging of Rubber: This phenomenon mostly occurs when the vehicle is parked under direct sunlight for extended periods. Over time, the tire rubber will show signs of premature aging and turn yellow.

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What to Do If 12 Points Are Deducted During the Probationary Period?

If 12 points are deducted during the probationary period, you need to reapply for a driver's license, which means starting over from scratch, retaking all exams from Subject 1 to Subject 4. More details are as follows: 1. Legal Provisions: Deducting 12 points during the probationary period will result in the revocation of the driver's license. Article 69 of Order No. 123 stipulates: If a motor vehicle driver accumulates a record of 12 points during the probationary period, the driving qualification for the probationary vehicle type will be revoked. If the revoked driving qualification is not for the highest permitted vehicle type, the highest permitted vehicle type driving qualification will also be revoked. 2. Additional Information: For drivers holding A1, A2, A3, B1, or B2 class permits, if they accumulate 6 or more points but fewer than 12 points during the one-year probationary period, the probationary period will be extended by one year. If they again accumulate 6 or more points but fewer than 12 points during the extended probationary period, the driving qualification for the probationary vehicle type will also be revoked.

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How to Obtain the Vehicle Environmental Protection Label?

To obtain the environmental protection label for a private car, you need to bring the original copies of three documents: the vehicle license, the motor vehicle registration certificate, and the owner's ID card. For company vehicles, you should bring the original copies of the vehicle license, motor vehicle registration certificate, and the enterprise organization code certificate or business license. Below is relevant information about vehicle labels: 1. Motor Vehicle Inspection Qualification Label: Valid for one year. 2. Vehicle Environmental Protection Label: Issued for energy-saving and emission-reduction inspections and regular environmental checks, categorized into yellow and green labels, with annual inspections required. 3. Compulsory Insurance Label: Currently, vehicles only need to display the compulsory insurance and annual inspection labels. The environmental protection label has been canceled and merged with the annual inspection label. Private vehicles with 6 seats or fewer (including 6 seats) are exempt from on-site inspections for the first 6 years, but every 2 years, the compulsory insurance must be submitted to the traffic police department for annual review to renew the annual inspection label. Starting from the 6th year, vehicles must undergo an annual inspection until the vehicle reaches 15 years of age.

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What problems will occur if a car fuse blows?

Car fuse failure indicates that the vehicle's related functions have malfunctioned or there is a short circuit in the wiring. If continuous fuse blowouts occur, detailed inspection of the wiring and related components is necessary, otherwise it will affect the normal operation of the vehicle. Below are some introductions about the fuse box: 1. Introduction: The fuse box is a container for installing fuses, facilitating fuse installation with features like waterproofing, fire resistance, and high-temperature tolerance. 2. Function: Generally, cars have two fuse boxes. One is responsible for the safety of external electrical components, such as the ECU, windshield washer fluid, car lights, horn, ABS, etc., mainly ensuring circuit safety, located in the engine compartment. The other ensures the normal operation of internal electrical components, such as the cigarette lighter, power windows, electric seats, and airbags, located on the left side of the steering wheel. 3. How to replace: Before replacing the fuse box, prepare for the uninstallation process. Do not remove the fuse box directly by hand; fuse boxes are usually secured with clips. Use tweezers to pull out the fuse and replace it with a new one. When cleaning the engine compartment, since the fuse box is not completely sealed, avoid direct water spraying as it may cause a short circuit in the fuse, leading to failure of the entire car's electrical system. Instead, use a damp towel for wiping.

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What Causes a Sudden Loss of Power While Driving Normally?

The reasons for a sudden loss of power while driving normally: 1. Ignition system issues: The vehicle's ignition system includes spark plugs and ignition coils. If there is a problem with the ignition system, the vehicle may exhibit slow RPM increase when the accelerator is pressed. 2. Intake system issues: If the throttle fails or there is a leak in the intake manifold, the vehicle's RPM will not increase when the accelerator is pressed. 3. Fuel delivery system issues: During normal engine operation, the fuel pump needs to build pressure. If the fuel pump cannot generate sufficient pressure, the fuel injectors will not be able to deliver enough fuel, resulting in a lack of power when the accelerator is pressed. 4. Damaged oxygen sensor: The oxygen sensor is responsible for detecting the oxygen content in the exhaust. The ECU uses data from the oxygen sensor to adjust the air-fuel ratio and other parameters such as ignition timing. If the oxygen sensor is damaged, it can cause the vehicle's RPM to fail to increase when the accelerator is pressed.

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What Are the Symptoms of Timing Chain Failure?

Timing chain failure symptoms: abnormal engine noise, high fuel consumption, increased oil consumption, car unable to start, insufficient power, severe exhaust emissions. Timing chain inspection methods: 1. Use a spring scale to check the elongation of the chain at three or more locations. If it exceeds the usable length, it should be replaced promptly; 2. Use a vernier caliper to measure the wear degree of the camshaft and crankshaft sprockets. If it exceeds the usage limit, they should be replaced promptly; 3. Use a vernier caliper to monitor the thickness of the tensioner and chain damper. If it exceeds the usage limit, they should be replaced promptly; 4. Check the elongation, wear, and breakage of the timing chain. If there is minor damage, it should not be used further.

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What are the reasons for uneven tire wear on the rear wheels of a Mercedes-Benz S-Class?

What Causes Yellowing of Tires? How to Clean Them?

What to Do If 12 Points Are Deducted During the Probationary Period?

How to Obtain the Vehicle Environmental Protection Label?

What problems will occur if a car fuse blows?

What Causes a Sudden Loss of Power While Driving Normally?

What Are the Symptoms of Timing Chain Failure?

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