What brand of tires does Mercedes-Benz use?

What Causes Idle Vibration When the Air Conditioner is On?

Reasons for idle vibration when the air conditioner is on are as follows: Ignition System Issues: Spark plugs have a limited lifespan. If the spark plugs have been used for a long time, they may not fire properly, leading to unstable idle speeds. Therefore, it is essential to inspect the ignition system, including the spark plugs, to determine if they need replacement or if there is excessive carbon buildup. If such issues are found and are causing the idle vibration, the spark plugs should be replaced or cleaned promptly. Throttle Body Needs Cleaning: The proper functioning of the throttle body directly affects the engine's performance. During vehicle operation, carbon deposits can accumulate in the throttle body. Excessive carbon buildup can obstruct normal air intake into the engine, resulting in insufficient engine power to drive the compressor or barely managing to do so. In such cases, idle vibration may occur when starting the car and turning on the air conditioner. Therefore, it is crucial to check the throttle body for cleanliness and clean it if necessary.

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What is the tire size of the new RAV4?

Toyota RAV4 comes with three tire models: 225/65R17, 225/60R18, and 235/55R19, which vary depending on the vehicle configuration. Most original Toyota RAV4 tires use brands like Yokohama or Dunlop, while some may feature Michelin or Bridgestone. The functions of tires and methods for determining when to replace them are as follows: Functions of tires: As one of the most critical components of a vehicle, tires not only affect the vehicle's handling performance but also the safety of passengers. After all, no matter how fast a car can go, it relies entirely on the four tire contact patches. Tires often operate under complex and demanding conditions, enduring various deformations, loads, pressures, and extreme temperatures during driving. Therefore, they must possess high load-bearing capacity, traction performance, and cushioning ability. Methods for determining tire replacement: Signs of tire aging primarily appear in the tread patterns and sidewalls; wear on the tread reaches the limit markers or even below them; localized bulges on the tire can lead to uneven stress distribution and potential blowouts; the depth and area of tire damage should be assessed to decide whether a repair or complete replacement is necessary.

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How Many Liters of Engine Oil Does Jetour Need?

Jetour requires 4 liters of engine oil when fully filled. Generally, it is sufficient to maintain the oil level between the minimum and maximum marks on the dipstick. Relevant details are as follows: Precautions for Adding Engine Oil: The engine oil can use a viscosity grade of 5W-40 semi-synthetic. When changing the engine oil, the oil filter should also be replaced. The oil level should generally be kept between the minimum and maximum marks on the dipstick. Try not to let it fall below the middle mark, as insufficient oil will reduce lubrication effectiveness. It is acceptable to have slightly more oil, but never exceed the upper limit on the dipstick, as this can create unnecessary resistance to the crankshaft's rotation, affecting power output and increasing fuel consumption. Functions of Engine Oil: Engine oil, also known as motor oil, lubricates the engine to reduce friction, assists in cooling, provides sealing to prevent leaks, prevents rust and corrosion, and acts as a shock absorber. It is often referred to as the 'blood' of a car. Engine oil consists of two main components: base oil and additives. The base oil is the primary component of the lubricant, determining its basic properties, while additives compensate for and enhance the base oil's performance, providing additional benefits. Additives are a crucial part of engine oil.

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Is the BMW 3 Series A for internal circulation or M?

BMW's internal circulation A and M are two modes of the AUC (Automatic Air Recirculation Control) system in the vehicle. A stands for automatic internal and external circulation, which automatically determines whether internal or external circulation is needed based on the air quality inside the car. M stands for internal circulation. The functions of external and internal circulation are as follows: Function of external circulation: External circulation primarily serves the purpose of ventilation, so it should be activated when the air inside the car becomes stale. During high-speed driving, if the car is sealed and only internal circulation is used, it can easily lead to insufficient oxygen inside the vehicle, which may cause driver fatigue, lack of concentration, and pose potential hazards. Function of internal circulation: Internal circulation is a state of the car's air conditioning system. In this state, the air exchange channels between the inside and outside of the car are closed. When the fan is off, the airflow inside the car does not circulate. When the fan is on, the air drawn in comes only from inside the car, creating an internal airflow circulation within the vehicle.

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Should the Filter Be Replaced When Changing Transmission Fluid?

When changing the transmission fluid, it is essential to replace the filter as well. This is because the filter continuously cleans the transmission fluid as the vehicle operates. Over time, metal shavings and sludge accumulate in the filter. If the filter is not replaced along with the transmission fluid, the cleaning effect will be compromised. Additionally, accumulated contaminants may break free from the filter, potentially clogging oil passages and affecting transmission performance. Here is more information about transmission fluid: 1. Transmission fluid serves multiple purposes, including cooling, lubrication, and power transmission. Many transmission shift control mechanisms rely on the fluid to function. Prolonged neglect of fluid changes can lead to failures in these control systems. 2. In torque converter transmissions, the torque converter—which connects to the engine—is filled with transmission fluid. In such transmissions, the fluid also plays a role in power transfer. 3. There are two methods for changing transmission fluid: the gravity drain method and the flush method using a specialized machine. The flush method is recommended despite its higher cost, as it removes more old fluid and ensures a cleaner, more thorough replacement. 4. When purchasing transmission fluid, opt for the OEM (Original Equipment Manufacturer) fluid. OEM fluids undergo rigorous testing by manufacturers to meet the transmission's requirements under various operating conditions.

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How to Check the Oxygen Sensor?

Oxygen sensor inspection methods are as follows: 1. Heater resistance check: Unplug the oxygen sensor wiring harness connector and use a multimeter to measure the resistance at the sensor terminals. If it does not meet the standard, replace the oxygen sensor. 2. Feedback voltage measurement: Unplug the oxygen sensor wiring harness connector. When measuring the feedback voltage, refer to the vehicle's circuit diagram, connect a thin wire from the feedback voltage output terminal of the oxygen sensor, then reconnect the harness connector. Measure the feedback voltage from the wire while the engine is running. 3. Maintain engine speed: Keep the engine running at around 2500 rpm and check if the voltmeter needle swings between 0-1V. Count the number of swings in 10 seconds. Normally, the feedback voltage should fluctuate around 0.45V, with at least 8 changes in 10 seconds. 4. Check for damage to the oxygen sensor: Unplug the oxygen sensor wiring harness connector to disconnect it from the ECU, placing the feedback control system in open-loop mode. 5. Inspect the oxygen sensor's appearance color: (1) Light gray tip: This is the normal color of an oxygen sensor; (2) White tip: Caused by silicon contamination, the oxygen sensor must be replaced; (3) Brown tip: Caused by lead contamination; if severe, the oxygen sensor must also be replaced; (4) Black tip: Caused by carbon buildup. After resolving the engine carbon deposit issue, the carbon on the oxygen sensor can usually clear automatically.

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What brand of tires does Mercedes-Benz use?

What Causes Idle Vibration When the Air Conditioner is On?

What is the tire size of the new RAV4?

How Many Liters of Engine Oil Does Jetour Need?

Is the BMW 3 Series A for internal circulation or M?

Should the Filter Be Replaced When Changing Transmission Fluid?

How to Check the Oxygen Sensor?

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Why does the Envision's center console dim when the battery is low?

How often should the tires of Geely Boyue be replaced?