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What is the reason why the sunshade curtain of BYD Song's sunroof cannot be closed?

1 Answers
StMargaret
07/29/25 3:57pm
The reasons why the sunshade curtain of BYD Song's sunroof cannot be closed are incorrect initialization position, sunshade curtain motor failure, circuit failure, and communication signal failure. The following is an introduction to car sunroofs: 1. Car sunroofs are installed on the roof, which can effectively circulate the air inside the car and increase the intake of fresh air. At the same time, car sunroofs can also broaden the field of vision and meet the shooting needs of mobile photography and videography. Car sunroofs can be roughly divided into: sliding-out type, built-in type, built-in flip-out type, panoramic type, and curtain type. They are mainly installed on commercial SUVs, sedans, and other models. 2. Built-in sunroof refers to a sunroof where the sliding assembly is placed between the interior and the roof. Its advantage is that the sunroof opening is large, and the appearance is simple and beautiful. Most sedans use built-in sunroofs. 3. The flip-out sunroof has the advantages of small size and simple structure. In addition, car sunroofs are installed on the roof, which can effectively circulate the air inside the car and increase the intake of fresh air, bringing healthy and comfortable enjoyment to the car owner.
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What are the differences between Mercedes-Benz models?

According to positioning, the last letter of the model name represents the class, with the prefix G representing SUVs, S representing sports cars, and C representing Coupe or coupe-style vehicles. The Mercedes-Benz GLK class has been renamed to Mercedes-Benz GLC, the M class to Mercedes-Benz GLE, and the GL class models to Mercedes-Benz GLS. This naming convention corresponds to the naming of the regular car series, making the class and positioning clear at a glance. The Mercedes-Benz CLK was renamed to the Mercedes-Benz E-Class Coupe after the introduction of the new E-Class, while the previously large coupe CL is now renamed as the S-Class Coupe. The Mercedes-Benz SLK-class sports car has also been renamed to Mercedes-Benz SLC. In terms of powertrain, most Mercedes-Benz models have completed the new powertrain system matching, so the numbers following the model names generally represent unified powertrain levels. For example, 260, 320, 400, 400h, and 500 represent an easily memorable powertrain system: 260 stands for the 2.0T high-power version, 320 for the 3.0T low-power version, 400 for the 3.0T high-power version, 400H for the 3.5L V6 naturally aspirated hybrid version, 500 for the 4.7T V8 powertrain, and 600 for the 6.0T V12 version. The 180 and 200 series are relatively more confusing. The A-Class and B-Class 180 models feature a 1.6T low-power version, the C-Class L-Class 180 has a 1.6T high-power version, and the E-Class L-Class 180 comes with a 2.0T ultra-low-power version. The A-Class and B-Class 200 models use a 1.6T high-power version, while the C-Class L-Class and E-Class L-Class 200 models are equipped with a 2.0T low-power version.
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What to Do When Your ETC Card Runs Out of Money on the Highway?

Currently, ETC cards are divided into three types: credit cards, debit cards (prepaid cards), and co-branded credit cards for toll payment. Among them, ETC debit cards do not have an overdraft function, so sufficient balance is required for passage. If the balance is insufficient, follow the instructions of the toll station staff to proceed to the MTC or manual lane, where you can pay the toll by swiping your card or using cash. ETC Lane: ETC is an electronic toll collection system that allows vehicles to pass without stopping. The ETC dedicated lane (Automatic Vehicle Identification, AVI), also known as the Electronic Toll Collection System (ETC system), is specifically designed for ETC vehicles equipped with an onboard unit (OBU) and does not have a manual toll collection platform. About Insufficient Funds in the ETC Lane: When an ETC vehicle enters the ETC lane and the transaction fails, the vehicle owner must comply with the arrangements made by the highway management authorities. If the ETC device cannot be used for the transaction, the owner must proceed through the manual lane by swiping the card. If the owner collects a toll card at the highway entrance, they cannot use the Jitong card for payment at the exit. If the owner collects the toll card normally at the entrance, they must proceed through the MTC lane for payment at the exit. In the highway electronic toll collection system, a single Jitong card cannot be used to pay for multiple vehicles. The rule of one card, one vehicle, and one tag must be strictly followed. When passing through a highway toll station, if the display shows insufficient balance, the owner must pay in cash to proceed. If the ETC lane does not lift the barrier when the ETC vehicle exits the highway, and the owner pays through the manual lane, but the ETC system still deducts the fee, resulting in a duplicate charge, the owner should keep the payment receipt and contact the ETC customer service for a refund. Important Notes on Passage Methods: Entering and exiting through the ETC lane will not result in a charge. Entering and exiting through the manual lane will not result in a charge. If entering through the manual lane and attempting to exit through the ETC lane, the barrier will not lift because the system lacks entry information. In this case, the owner must choose the manual lane. Entering through the ETC lane and exiting through the manual lane allows normal passage without a charge. Precautions for Using ETC Cards: Before using the ETC system at a toll station, ensure the ETC card is properly inserted into the OBU. During driving, bumps may loosen the card, so it should be checked and reinserted if necessary. The ETC card must be dedicated to the specific vehicle and cannot be changed arbitrarily after binding. Before using the ETC system, check the fee information displayed on the dedicated lane sign. If the card balance is insufficient, recharge it promptly. If the barrier does not lift when passing through the ETC lane, follow the instructions of the toll station staff or switch to the manual toll lane. If the ETC lane is temporarily closed at a highway toll station, use the manual toll lane for payment. The speed limit in the ETC dedicated lane is 20 km/h, and a distance of at least 5 meters should be maintained from the vehicle ahead. If an ETC vehicle collects a toll card in the manual lane, it cannot use the ETC lane when exiting the highway and must use the manual lane instead.
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Can ETC be unused after installation?

It is possible to install ETC without using it. According to Article 19 of the "Notice on Vigorously Promoting the Development and Application of ETC on Expressways" issued by the State Council, vehicles that have not applied for or do not use ETC by 2020 will not enjoy toll discounts. In the future, only one manual lane will be retained at expressway toll stations, and tolls can only be paid through manual channels. How ETC works: Through dedicated short-range communication between the onboard electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station, computer networking technology is used to perform backend settlement processing with banks. This achieves the goal of vehicles passing through expressway or bridge toll stations without stopping while still paying the toll. ETC deduction principles: For ETC vehicles, the toll amount is rounded according to the "round down below 0.5, no action for 0.5 or above" rule (i.e., amounts with a decimal less than 0.5 are rounded down, while decimals of 0.5 or more remain unchanged). After applying a 5% discount, the amount is then rounded to the nearest cent. MTC vehicles still follow the "round to the nearest yuan" rule. All this is based on the principle of passing first and deducting fees later. Benefits of installing ETC: Save time: Eliminates the hassle of waiting in line; Green and eco-friendly: Low-carbon, as vehicles pass through toll stations without stopping, reducing noise and exhaust emissions and minimizing pollution; Reduce wear and tear: Saves costs by decreasing the frequency of vehicle starts and stops, lowering wear and fuel consumption; Improve efficiency: Theoretically, ETC lanes can increase passing efficiency by 2-3 times, making traditional ETC faster, more advanced, and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous. More policy support: The State Council clearly stated in the "13th Five-Year Plan for the Development of a Modern Comprehensive Transportation System" that "by 2020, intercity transportation card interoperability will be basically achieved in key city clusters, and the proportion of vehicles equipped with ETC will significantly increase." It also set a target in the "13th Five-Year" comprehensive transportation development indicators: "By 2020, the ETC usage rate for road passenger vehicles should reach 50%." More future possibilities: In addition to continuously improving the convenience of ETC installation and usage rates for passenger vehicles, the future will also promote ETC usage for trucks and explore deeper integration of ETC systems with smart transportation directions such as vehicle-to-vehicle communication and vehicle-road coordination, providing comprehensive travel services for car owners. This means more application scenarios will support ETC usage.
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What do the speed rating letters on car tires represent?

Car tire speed rating letters indicate the maximum speed at which the tire can carry a specified load under defined conditions. Different letters represent different speed ratings, with most passenger car tires falling between S and Y, corresponding to maximum load-bearing speeds ranging from 180 to 300 km/h. As rubber products, tires gradually lose their load-bearing capacity over time due to aging. Additionally, heat generated from rising road temperatures and the compression/deformation during rolling significantly reduces the tire's actual maximum speed capability. Therefore, manufacturers typically equip vehicles with tires rated several levels higher than the maximum required speed to ensure safety.
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How to Solve the Problem of Engine Oil Burning in Trucks?

Truck engine oil burning issues can be resolved as follows: 1. Cold engine oil burning: Solution: Remove the engine cylinder head and replace the valve stem seals (rest assured, this is considered a medium repair job. The repair time is approximately 4-5 hours. Costs vary depending on the vehicle). 2. Hot engine oil burning: Solution: Following standard repair procedures, the engine needs to be removed for a major overhaul. The repair time is approximately 2-4 days. Costs vary depending on the vehicle, with expenses mainly high on parts.
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How to Read the Car Temperature Gauge

Temperature gauge refers to the water temperature gauge. The water temperature ranges from C to H, where C represents 60 degrees. Once the needle points to C, it indicates the water temperature has reached 60 degrees. The red H section represents 110 degrees, and the span from 60 to 110 degrees allows you to estimate the temperature indicated by the gauge. Relevant information about the car thermometer is as follows: 1. Function: The main function of the car thermometer is to accurately measure and display the internal temperature of the vehicle, enabling real-time monitoring to effectively prevent damage to the car under freezing conditions. 2. Types: Adhesive cold-light mercury thermometer for cars; car-mounted LCD thermometer with temperature probe; automotive temperature sensor.
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