Why is there no sound from the hidden dash cam in Mercedes GLC260?

Can I add antifreeze by myself?

Antifreeze can be added by yourself, but it is necessary to choose the same brand, same model, and same specification of antifreeze product. Add appropriately based on the remaining antifreeze content in the engine. Antifreeze replacement cycle: For vehicles that run for long periods, such as taxis, high-quality antifreeze generally needs to be replaced once a year. For vehicles with shorter running times, it can be replaced every two years or every 30,000 kilometers. To prevent excessive foam formation, which reduces the heat exchange efficiency between the antifreeze and engine components, ensure the product is within its validity period when adding. Long-lasting antifreeze can have a validity period of up to three years. If suspended matter, sediment, or signs of deterioration or discoloration are found in the antifreeze, it should be replaced promptly, and the system should be cleaned. Antifreeze replacement method: Before completely replacing the antifreeze, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a focus on the five-way hose. The five-way hose is named for its five connections to various parts, and the antifreeze is distributed to different sections of the car after flowing through it. If there is any leakage of antifreeze in this part, replace the hose or re-secure the connections as needed. Drain the old antifreeze, then flush the liquid channels with clean water. Add clean water to the antifreeze reservoir and continue to pour water into the reservoir, allowing it to flow continuously through the engine cooling system. Then, start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir may have a faint pink color. Continue adding clean water until the water coming out is clear. Note: Do not forget to remove the heater hose and drain the water from the heater core.

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Why is the Land Rover Evoque air conditioning not cooling?

Common reasons for car air conditioning not cooling are likely due to minor refrigerant leakage or excessive refrigerant. Here are solutions for car air conditioning refrigerant issues: 1. Minor refrigerant leakage: This can be observed through the sight glass on the dryer tank. During normal operation, if continuous slow bubbles appear in the sight glass, it indicates insufficient refrigerant. If obvious bubble flipping occurs, it means severe refrigerant shortage. The solution is to add refrigerant, but note: if adding from the low-pressure side, never invert the refrigerant bottle; if adding from the high-pressure side, never start the engine. 2. Excessive refrigerant: Also observable through the sight glass on the dryer tank. If no bubbles are visible during operation and none appear after compressor shutdown, it confirms excessive refrigerant. If excessive pressurized cooling oil is present, somewhat turbid bubbles will be visible during normal operation. If refrigerant is indeed excessive, it can be slowly released from the low-pressure side maintenance port of the air conditioning system.

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Why is there abnormal noise when turning on the AC button?

When the air conditioner is turned on, abnormal noise from the engine area mainly has two causes: 1. Metal friction sound emitted when the compressor electromagnetic clutch engages. 2. Squeaking sound caused by excessive force on the air conditioner belt. Note: These two situations only occur when accelerating with the air conditioner on. The specific reasons are as follows: 1. Lack of refrigerant oil: Metal friction sound is emitted when the compressor electromagnetic clutch engages, usually due to insufficient refrigerant oil for lubrication inside the compressor. When refrigerant oil is lacking, the internal piston of the compressor does not receive adequate lubrication, resulting in metal friction sounds under the high pressure of the refrigerant. 2. Electromagnetic clutch failure: The electromagnetic clutch itself is faulty, with internal bearing damage causing abnormal noise, requiring compressor replacement.

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Can a Temporary ID Card Be Used for Subject 4 Exam?

Temporary ID cards can be used for the Subject 4 exam because they hold the same legal validity as permanent ID cards. Simply visit any public security bureau, present your household registration booklet and a recent one-inch black-and-white photo without a hat, pay a processing fee of 10 RMB, and you can obtain a temporary ID card on the same day. The Subject 4 exam consists of 50 questions, primarily presented in the form of case studies, images, and animations. The total score is 100, with a passing score of 90. Subject 4, also known as the theoretical exam or driver's theory test, is part of the motor vehicle driver's license assessment. After the implementation of the Ministry of Public Security's Order No. 123, the Subject 3 exam was divided into two parts: the road test and an additional safety and civics knowledge test, commonly referred to as "Subject 4," which evaluates "driving ethics." Since this test is conducted after Subject 3, it is colloquially called the Subject 4 exam. Officially, however, there is no such term as Subject 4. If you fail the Subject 4 exam, you do not need to retake the previously passed subjects (Subject 1, Subject 2, Subject 3). You can schedule a retake on your own without any additional fees. There are no restrictions on the number of retakes, but the driving skills test permit is valid for three years. If the applicant fails to complete all exams within this period, the results of any passed subjects will become void.

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How to Use the Reversing Camera for Backing Up?

Reversing camera details are as follows: Red line: indicates the warning line, 30cm from the rear of the vehicle. When the vehicle approaches this line, the parking space is just right, and no further reversing is needed; Yellow line: indicates the deceleration line, 60cm from the rear of the vehicle. You can continue to reverse, but pay attention to decelerating and checking the distance; Green line: indicates the normal safety line, where the distance between the obstacle and the rear of the vehicle is large, and you can reverse with confidence. Note: Before reversing, check the situation behind the vehicle, estimate the reversing route, and ensure that the front of the vehicle will not hit any obstacles during the process. Try not to accelerate while reversing and control the speed.

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Does a 2012 vehicle require annual inspection in 2021?

For a 2012 vehicle, if it underwent annual inspection before the implementation of the new policy, it will require inspection in 2021; if it was inspected after November 20, 2020, it will not need inspection in 2021. Relevant information about vehicle annual inspection is as follows: 1. Non-operational mini and micro passenger vehicles with 7 to 9 seats within 6 years: Eligible vehicles are exempt from inspection. 2. Non-operational mini and micro passenger vehicles: For those over 6 years but under 10 years, the inspection frequency changes from once a year to once every two years. 3. For private vehicles over 10 years old: Follow the original inspection cycle, i.e., once a year for vehicles between 10 and 15 years old, and once every six months for vehicles over 15 years old.

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Why is there no sound from the hidden dash cam in Mercedes GLC260?

Can I add antifreeze by myself?

Why is the Land Rover Evoque air conditioning not cooling?

Why is there abnormal noise when turning on the AC button?

Can a Temporary ID Card Be Used for Subject 4 Exam?

How to Use the Reversing Camera for Backing Up?

Does a 2012 vehicle require annual inspection in 2021?

Is It Harmful to Leave a Car with a Flat Tire Overnight?

What Causes the Buzzing Noise Inside the Pajero While Driving?

How many times do you need to press the one-button start to start the car?

Can You Keep High Beams On All the Time on the Highway?