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What does the 'mode' on a car's air conditioner mean?

1 Answers
Gabriel
07/29/25 10:21pm
mode in Chinese means mode or method. The 'mode' on a car's air conditioner refers to switching the air outlet mode, allowing you to switch between blowing air at the feet, head, or windshield. Below are introductions to other buttons on a car's air conditioner: 1. A/C button: The A/C button is the switch for the air conditioner compressor. Only when the compressor is turned on does the air conditioner have cooling capability. When the A/C light is on, it indicates that the compressor is working, and the car's air conditioner can cool. 2. MAX button: When the MAX function is activated, the car's air conditioner operates at full capacity with the fan at maximum speed. This function is only available on some models with automatic air conditioning. Pressing the MAX button causes the air conditioner compressor and fan to operate at maximum output to quickly reach the set temperature.
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Why does the ETC device prompt 'Label Removed'?

ETC displays 'Label Invalid' due to unauthorized removal or relocation of the OBU device, or detachment/loosening of the ETC electronic tag. It needs to be reinstalled and reactivated at the original processing point or any highway ETC service center. The ETC installation process is as follows: Upon receiving the device, first check if the ETC card and electronic tag (OBU) are damaged. Press the anti-removal button on the back of the OBU; a red light will briefly turn on, and the OLED screen will display 'Label Invalid' or 'Please Insert Card,' indicating the device is functioning normally. Clean the front windshield to ensure the surface is smooth, clean, and dry. Then peel off the adhesive backing of the OBU and stick it to the installation position. Press firmly for 2-3 minutes to remove any air bubbles. Insert the ETC card with the front facing the driver and the back facing the windshield, ensuring the chip is inserted into the OBU device. ETC activation method: Insert and remove the ETC card twice consecutively until the electronic tag screen displays 'Bluetooth On.' If 'Label Invalid' appears when inserting/removing twice without the electronic tag attached, this is normal and does not affect activation. Alternatively, press the button on top of the electronic tag to enable Bluetooth. Turn on your phone's Bluetooth and open the corresponding mobile app (usually with a download QR code on the electronic tag), then enter the device activation interface. Click 'Device Connection' and wait patiently for the 'Connection Successful' prompt. After successful connection, upload a photo of the vehicle's front to complete activation.
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How much engine oil remaining indicates the need for maintenance?

When the remaining engine oil drops below approximately 10%, the vehicle's combination instrument will issue a prompt to replace the oil promptly, and maintenance should be performed as soon as possible in response to this reminder. During maintenance, all the engine oil should be replaced, not just topped up. After the oil change, the vehicle's combination instrument will display a 100% oil life, which is reset by the maintenance technician and not automatically restored. As time and mileage increase, the oil's service life will gradually decrease. Under normal circumstances, maintenance can also be scheduled based on mileage. The lifespan of engine oil is determined by the distance traveled and the oil's shelf life, with different types of oil requiring different maintenance intervals. Conventional oil needs to be replaced every 6,000 to 8,000 kilometers, while synthetic oil requires replacement every 15,000 to 20,000 kilometers.
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What brand is the transmission of the Audi S4?

The Audi S4 has 2019 and 2018 models. Taking these two models as examples, the Audi S4 uses an 8-speed manual-automatic transmission. Typically, a manual-automatic transmission refers to an AT transmission with a manual mode. The term 'manual-automatic' means the transmission has a manual mode; without a manual mode, it is simply called an automatic transmission. Transmission oil replacement methods: 1. Gravity replacement. The principle of replacement is similar to that of engine oil. After loosening the tightening nut at the bottom of the oil pan, the transmission oil will automatically flow out from the drain hole. This method is the most common and easy to operate, but it cannot completely drain the transmission oil. Not all transmission oil can be discharged, mainly because the mechanical structure has dead corners such as depressions and pits. 2. Circulation machine replacement. The new transmission oil is stored inside the circulation machine, and the transmission and circulation machine are connected through pipeline interfaces. The new oil pushes out the old oil under the action of the circulation machine. This method cleans the oil circuit more thoroughly. The more new transmission oil is used, the cleaner the oil circuit becomes. Replacing the transmission oil once with a circulation machine requires about 10 liters of oil. This method takes about 1 hour. 3. Removing the oil pan to change the oil. This method replaces and cleans from the root and can also handle dirty oil filters. Removing the oil pan is a major task, and the labor cost will be significantly higher.
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Does a hybrid vehicle use electricity or fuel first?

Hybrid vehicles use electricity first. The powertrain of a hybrid electric vehicle mainly consists of a control system, drive system, auxiliary power system, and battery pack. When the vehicle starts moving, the battery is fully charged, and its energy output can meet the vehicle's requirements, so the auxiliary power system does not need to operate. Here is additional information: Hybrid vehicles: Hybrid vehicles offer high fuel efficiency and superior driving performance. The engine of a hybrid vehicle uses fuel, but during startup and acceleration, the assistance of an electric motor helps reduce fuel consumption. Simply put, compared to a similarly sized conventional car, hybrid vehicles have lower fuel costs.
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How to Check Tire Pressure for Mercedes-Benz?

Mercedes-Benz can use a tire pressure gauge to check tire pressure. Basic information about tire pressure gauges: A tire pressure gauge is a tool used to measure the air pressure in vehicle tires. There are three types of tire pressure gauges: pen-type, mechanical pointer-type, and electronic digital display-type. Among these, the digital display-type provides the most accurate readings and is the most convenient to use. Air pressure is critical to tire health; both overinflation and underinflation can shorten a tire's lifespan. Underinflation increases tire deformation, leading to cracks on the tire sidewalls, excessive flexing, overheating, rubber degradation, and fatigue or breakage of the tire's fabric layers. Method for checking tire pressure: Prepare a tire pressure gauge and locate the manufacturer's recommended tire pressure label before measuring. Press the gauge's valve interface onto the tire's air valve until the pointer reaches its highest value, then read the pressure. The process is simple, but don't forget to press the gauge's reset button after checking and to replace the valve cap. When inflating the tire, connect the air pump's hose to the valve. Ensure the hose connections are secure and plug the pump's power into the car's cigarette lighter. It's best to keep the engine running while using the pump to avoid draining the battery. Monitor the pump's pressure gauge closely during inflation. If the pressure exceeds the manufacturer's recommendation, release some air using a portable tool. You can test for leaks by applying water to the valve. Once the pressure approaches the recommended level, turn off the pump and remember to replace the valve cap.
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Can I Take the Subject 4 Test If I Failed Subject 2 but Passed Subject 3?

No, you must first pass Subject 2. Below is relevant information about Subject 4: 1. Concept: Subject 4 is an additional safety and civilization knowledge test added to the Subject 3 road test. Officially, there is no Subject 4. 2. Test content: The test paper consists of 50 questions, mainly in the form of cases, pictures, and animations, with a full score of 100 and a passing score of 90. The main test content of Subject 4 includes safe and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-traffic accident handling knowledge.
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