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What Causes Windshield Fogging?

1 Answers
LeJordan
07/30/25 5:30am
Fogging on the outside of the car's front windshield is caused by the temperature difference between the inside and outside of the vehicle. When the temperature inside the cabin is lower than the outside temperature, moisture from outside condenses on the windshield, forming fog. This phenomenon is more common in winter. Solutions for fogging on the outside of the car windshield: Air Conditioning Defogging. This is a relatively simple method. Just turn on the front window defogging mode, set the fan speed to maximum, turn on the A/C switch, and adjust the temperature to the lowest setting. After a while, the fog on the glass will disappear. Some models are equipped with rear window and side mirror electric heating, which can eliminate fog in about a minute by turning on the switch. Some vehicles have a one-touch defogging function, which can be activated when fogging occurs. This method is suitable for summer rainy seasons. In winter, you can use the air conditioning's hot air to defog. If the car has just started, avoid turning on the air conditioning immediately. Wait a few minutes for the engine to warm up and the water temperature to rise, then start heating. Set the air volume to maximum and turn on the front window defogging mode. The fog should disappear within a few minutes. Air Convection. Opening the windows can increase air convection, reduce the temperature difference between the inside and outside of the car, and weaken the conditions for fog formation. This method is not suitable when it's raining. Defogging Spray. A preventive measure is to use a defogging spray. Simply spray it evenly on the glass surface and wipe it clean with a dry towel. Its principle is to use surfactants to leave a protective film on the glass surface, altering the surface tension of water molecules so that fog droplets coalesce into larger droplets, thus not obstructing vision. This method can also be applied to other car windows.
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Can the Porsche 718 accommodate four people?

Porsche 718 Boxster and 718 Cayman are both two-door, two-seater sports cars and cannot seat four people. Although the Porsche 718 sacrifices some passenger space, its advantages as a sports car are quite evident. The mid-engine layout places the center of gravity at the center of the body, resulting in a small horizontal inertial moment during high-speed cornering, which gives the car perfect handling. Due to its small inertial moment, it offers excellent maneuverability with very sharp steering. Below is an introduction to the Porsche 718: 1. The Porsche 718 is Porsche's entry-level sports car, available in two models: the sports car Porsche Cayman and the convertible Porsche Boxster. 2. Porsche officially states that the car's total weight will be controlled at 1,200 kilograms, which is 100 kilograms lighter than the previous Boxster. The power output has also been reduced, possibly featuring a four-cylinder engine with a displacement of 2.0 liters and an output of 286 horsepower, or Porsche's 2.5-liter engine with an output of 360 horsepower.
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What are the precautions for part-time four-wheel drive?

Regarding the precautions for part-time four-wheel drive, the following points should be noted: 1. Situations where four-wheel drive mode should not be used: Do not use four-wheel drive mode when driving on paved roads or surfaces with good traction and high friction. (Using four-wheel drive mode on paved roads can make steering difficult, posing driving hazards and potentially damaging the four-wheel drive system.) 2. Situations where four-wheel drive mode should be used: Activate four-wheel drive mode when driving on slippery surfaces such as rainy or snowy roads, muddy mountain paths, or sandy unpaved roads with low friction. This can significantly improve driving safety. 3. Characteristics of part-time four-wheel drive: Part-time four-wheel drive is purely mechanical, offering strong operability, reliability, and durability. The driver must assess road conditions and manually switch driving modes. Part-time four-wheel drive is the most common drive mode in SUV models, ensuring both vehicle power and off-road capability while maintaining fuel efficiency.
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Is Full Coverage Insurance Mandatory for New Cars?

Full coverage insurance is not mandatory for new cars; the types of insurance to purchase can be decided based on your actual situation. Additional information: 1. For cars purchased with installment payments: During the installment period, commercial insurance must be purchased at the dealership every year, and full coverage insurance is also required. 2. If the car is purchased outright, some 4S stores may stipulate that the first year's commercial insurance must be purchased at the store; otherwise, the car will not be sold. If there are no such complicated regulations and consumers are free to choose, they can select insurance types based on their circumstances: (1) Car insurance includes compulsory traffic insurance and commercial insurance, with compulsory traffic insurance being mandatory by the state. (2) Commercial insurance includes many types, such as third-party liability insurance, vehicle damage insurance, etc. If your driving skills are very proficient and you have never had any scratches or dents in over a decade of driving, you may choose not to purchase vehicle damage insurance. If your driving skills are not very proficient and you often experience scratches, you might consider purchasing vehicle damage insurance for your car. If the security in your residential area is not very good, you could buy theft insurance for your car. If your area frequently experiences heavy rainstorms, you might consider purchasing water damage insurance for your car.
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Where is the anti-skid switch on the Buick GL8?

The anti-skid switch on the Buick GL8 is located below the steering wheel, marked with a skid symbol. This is the anti-skid switch. In almost all vehicles, if the anti-skid system is turned off, the indicator light will illuminate. If the anti-skid system is turned on, the indicator light will turn off. Below is an introduction to the Buick GL8: 1. The new generation Buick GL8 Avenir family has body dimensions of 5219mm × 1878mm × 1799mm, with a wheelbase of 3088mm. The Avenir-exclusive design elements are prominently displayed throughout the vehicle: the exclusive three-dimensional mesh grille is inspired by the chainmail armor of medieval nobility, crafted with exquisite metal weaving techniques to present an elegant rhythm under different angles and light reflections; the exclusive 18-inch crown-style aluminum alloy wheels exude tension; the Avenir-exclusive badges on the fenders and rear of the vehicle further highlight its prestigious identity. 2. The new generation Buick GL8 family is equipped with General Motors' latest Smart Propulsion technology, featuring the eighth-generation Ecotec 2.0T variable-cylinder turbocharged engine and a 9-speed HYDRA-MATIC intelligent transmission. This powerful combination delivers 174kW and 350Nm of robust power, with a combined fuel consumption of only 7.9L/7.8L per 100km. The 9-speed intelligent transmission and the newly equipped ETRS electronic gear shift ensure quicker shift responses and smoother power output.
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What procedures are required for registering an imported vehicle?

Prepare the necessary documents for registration; first, go to the local Entry-Exit Inspection and Quarantine Bureau to obtain the quarantine certificate for imported motor vehicles and fill out the application form; then, pay the vehicle purchase tax at the State Taxation Bureau and complete the purchase tax declaration; finally, provide the original Certificate of Imported Goods at the Vehicle Management Office as part of the registration process for imported vehicles. The specific process for registering an imported vehicle: Required documents for registration include the original and copy of the Certificate of Imported Goods, the original and copy of the Inspection Certificate for Imported Motor Vehicles (two copies), the original Unified Sales Invoice for Motor Vehicles (three copies), personal identification (ID card copy), or organizational documents (original and copy of the Organization Code Certificate), and the duplicate of compulsory traffic insurance. First, go to the local Entry-Exit Inspection and Quarantine Bureau to obtain the quarantine certificate for imported motor vehicles, fill out the application form, and provide the Certificate of Imported Goods, Inspection Certificate for Imported Motor Vehicles, copy of the purchase invoice, and copy of the Organization Code Certificate (with the official seal of the organization for organizations, or ID card copy and signature for individuals). Then, pay the vehicle purchase tax at the State Taxation Bureau, complete the purchase tax declaration form, and provide the Certificate of Imported Goods, copy of the locally issued Inspection Certificate for Imported Motor Vehicles, tax payment copy of the purchase invoice, and copy of the Organization Code Certificate (not required for individuals). Finally, go to the Vehicle Management Office. No additional vehicle inspection is required locally, just provide the original Certificate of Imported Goods.
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What to Do When a Car Gets Flooded?

Push the car to a higher ground area without water accumulation, remove all items from the cabin, and then inspect components such as wiring and the computer for any short circuits or burnouts. Call the insurance company and have the car towed to a repair shop to assess the flooding damage. Vehicle flooding can be categorized into two scenarios: 1. Flooding while driving: Water can enter the engine through two main pathways: first, due to the low position of the engine air intake, water can be sucked into the engine during wading; second, if the exhaust pipe outlet is below the water level, water can be drawn into the engine through the exhaust pipe during wading. It's easy to understand how water enters through the air intake—when the engine "releases throttle," the sudden drop in RPM creates a momentary negative pressure in the exhaust pipe. The strong atmospheric pressure then forces water into the exhaust pipe, as if the exhaust pipe is sucking in the water. 2. Flooding while parked: If the car is parked in a low-lying area with poor drainage, it may get flooded during heavy rain. After flooding, external water can enter the cabin through gaps like door seams and the external air circulation channels of the air conditioning system. This usually results in the carpet below the seats being completely soaked. If the external water level is high, the battery and some electrical components may also be damaged by water. For vehicles severely flooded while parked, repair shops typically remove all items from the cabin, inspect wiring and computer components for short circuits or burnouts, and replace damaged parts if necessary. As for the soaked carpets and interior trim, they can be cleaned and dried.
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