What are the precautions for new cars?

What kind of engine oil should be used for BMW 7 Series?

BMW 7 Series should use engine oil with the specification of 0W40, and the brand is BMW. If you want to change the engine oil during later maintenance, you can choose brands such as Mobil and Castrol. The viscosity of engine oil will change with temperature, so special attention should be paid to its performance under low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity. 5W means it can withstand low temperatures of -30°C. The smaller this number, the better the low-temperature fluidity, and the smoother the cold start of the car will be. The latter number represents the kinematic viscosity of the oil at 100°C. The higher the value, the better it can maintain viscosity at high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. The method for changing the engine oil of BMW 7 Series is as follows: Wait for the engine temperature to drop, and also allow the engine oil to flow back to the oil pan; Use a wrench to loosen the oil drain plug, and use an oil pan to catch the old oil until no more oil flows out. Start the engine and let it run for 30 seconds to allow the oil in the main oil passage to flow out; Use a special wrench to remove the oil filter; apply engine oil to the oil seal of the new oil filter, and tighten it clockwise by hand; Add the new engine oil through the oil filler cap on the engine valve cover, generally filling about three-quarters of a barrel; Start the engine and let it run for 5 minutes, then check for oil leaks at the oil drain plug and oil filter. If there are any, repair them; After stopping the engine, pull out the oil dipstick and check that the engine oil level is within the standard range.

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What Causes Slow Window Movement?

Reasons for slow window movement: 1. Possible malfunction of the window regulator; 2. Potential motor aging leading to insufficient power; 3. Overly tight window felt channels or foreign objects in the window track; 4. Aged outer water seal strips creating excessive resistance or deteriorated inner dust seals. Prompt inspection and repair at a service center is recommended. Solution: Apply window lubricant by first lowering the window and thoroughly cleaning the window surface, rubber seals, and crevices of dust and stains. Shake the window lubricant well before use, then insert the applicator tube into the nozzle. Evenly spray the lubricant along the window rubber channel, allow it to sit briefly, wipe away excess lubricant with a cloth, then test window operation.

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What is the solution for stiff car window operation?

The solutions for stiff car window operation are: 1. Clean the dust-proof strips on the doors and windows, and spray dashboard wax into the glass channels on both sides; 2. Visit a 4S shop to clean the window lift motor. Car glass maintenance methods: 1. Use special or suitable wiper blades and replace them in time to avoid scratching the windshield; 2. Use car-specific glass cleaner, which can increase lubrication and reduce wear on the windshield; 3. Avoid using the wiper to remove debris on the windshield—use a towel instead; 4. During rain, use the wiper to wipe off dust and other particles to prevent scratching the windshield; 5. Place labels on the windshield using static cling film to avoid scratching when removing adhesive; 6. In winter, cover the windshield when parking outdoors to prevent frost damage; 7. Avoid driving behind large vehicles to prevent stones from hitting and damaging the windshield.

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What to Do When Car Windows Fog Up?

Here are ways to solve the issue of car window fogging: Press the defog button, turn on the air conditioning (A/C) switch, and activate the external circulation to remove fog. Use the air conditioning's dehumidification function to reduce air humidity and eliminate fog. Reduce the temperature difference to prevent window fogging. Apply anti-fog spray to prevent dirt and stains on the windows. Open the windows to allow air convection between the inside and outside of the car, which will reduce the temperature difference and gradually dissipate the fog. Causes of car window fogging: There is a temperature difference between the inside and outside of the car. If the temperatures differ, the surface with the lower temperature will have a lower saturated vapor pressure than the surrounding environment, causing water vapor to condense on the glass surface in tiny droplets, forming fog.

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Where is the light switch located in a car?

There are two types of light switches in a car: one is a rotary lever switch, and the other is a rotary knob switch. Both are located on the dashboard. Automatic lights: When turned to automatic lights, the light sensor detects the brightness and darkness of the environment and automatically turns the headlights, other external lights, and dashboard lighting on or off. When turned to parking lights: The small lights of the car will turn on. Parking lights are a type of warning light, white in the front and red in the back, usually installed at the edges of the car's roof. This indicates both the height and width of the car. They are generally turned on when it is not completely dark, often used in the evening.

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Why does the steering wheel light stay on and the car won't start?

This indicates that the vehicle's emergency anti-theft system has been activated. The anti-theft system is a car security lock designed to immobilize the steering wheel, consisting of a lock rod, lock body, and lock handle. Engine immobilizer system: Each key contains an embedded transponder. When the driver inserts the key into the ignition switch cylinder and turns it to the "ON" position, the electronic anti-theft ECU communicates with the key via radio frequency. If the key is verified as legitimate, the anti-theft ECU will then perform password authentication with the engine ECU. If the password is correct, the engine will be allowed to start. Classification of vehicle anti-theft systems: Mechanical anti-theft, electronic anti-theft, and network-based anti-theft.

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What are the precautions for new cars?

What kind of engine oil should be used for BMW 7 Series?

What Causes Slow Window Movement?

What is the solution for stiff car window operation?

What to Do When Car Windows Fog Up?

Where is the light switch located in a car?

Why does the steering wheel light stay on and the car won't start?

Is it okay not to tint car windows?

What Are the Reasons for a Car Not Spraying Windshield Washer Fluid?

How Often Should Windshield Washer Fluid Be Replaced in a Sedan?

What Are the Reasons for Windshield Washer Fluid Not Spraying?