Can the exterior differences between 730 and 740 be identified?

What lights should you turn on when driving in a heavy rainstorm?

When driving in heavy rain, turn on the headlights or front fog lights. Precautions for driving in rainy weather are as follows: 1. Turn on the wipers promptly; 2. If there is frost on the windshield, turn on the air conditioning and direct the cold air toward the windshield; 3. The driver should hold the steering wheel with both hands to maintain straight and low-speed driving, and brake gently to prevent the tires from locking up and causing the vehicle to skid; 4. Reduce the vehicle's speed, pay attention to the distance between the front and rear vehicles, and be mentally prepared to take emergency measures in advance. Car headlights, also known as car front lights or LED daytime running lights, should be maintained by: 1. Regularly checking the sealing of the headlights—if the sealing ring between the lens and reflector is damaged, replace it promptly; 2. Regularly cleaning the reflector—if it turns black and the brightness decreases, replace it; 3. Regularly removing dust and stains from the bulbs.

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What Causes Rough Gear Shifting in Automatic Transmissions?

Rough gear shifting in automatic transmissions may be caused by: transmission clutch pressure leakage; obstructed or sluggish transmission oil passages; insufficient or excessive transmission fluid levels; or damaged solenoid valves. The engine's power is transmitted through the transmission, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume over 10% more fuel than manual transmissions. Whether manual or automatic, transmissions with more gears tend to be more fuel-efficient. Below is relevant information: 1. Damaged solenoid valves: If sludge circulates within the transmission fluid and blocks the oil passages in the valve body, it can cause rough shifting. Over time, this can lead to a series of transmission issues such as overheating, impact, and slipping. 2. Incorrect transmission fluid levels: Verify whether the transmission fluid is at the standard level. Both insufficient and excessive transmission fluid can cause this issue. For vehicles equipped with a transmission dipstick, check whether the fluid level is within the standard range when the engine is running.

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Symptoms of a Faulty Thermostat in Jetta?

Jetta thermostat failure symptoms are as follows: 1. Thermostat malfunction with insufficient opening affects the engine's large and small circulation cycles, preventing effective heat dissipation and causing engine coolant temperature to rise; 2. Excessive thermostat opening leads to low engine coolant temperature, slow temperature rise, increased fuel consumption, and abnormal engine noises; 3. Thermostat sticking tends to cause carbon buildup, resulting in unstable engine idle speed and engine vibration. Below is how the thermostat works: 1. The thermostat is a valve controlling coolant flow path. It's an automatic temperature-regulating device typically containing temperature-sensing components that open/close air, gas or liquid flow through thermal expansion/contraction. 2. At normal temperature, the wax remains solid. When water temperature is below 76°C, the main valve closes completely while the bypass valve opens fully, allowing water from the cylinder head to directly enter the water pump via the bypass pipe (called small circulation). As water only flows between pump and water jacket without passing through the radiator and with small flow rate, the cooling intensity is weak.

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What Causes the Noise When Shifting Gears in an Automatic Transmission?

The reasons for noise when shifting gears in an automatic transmission are as follows: 1. Large valve clearance when the engine is cold: Poor lubrication can cause noise during gear shifting between cold and warm engine states, lasting about 3 minutes, but this is a normal phenomenon. 2. Issues caused by parking on a slope: If you engage the P (Park) gear before applying the handbrake when parking on a slope, the vehicle's weight will be entirely on the P gear due to inertia, leading to noise when shifting gears. However, if you apply the handbrake first, the handbrake will bear the weight, and no noise will occur. 3. Transmission problems: Wear and tear in the transmission, such as a loose driveshaft, worn differential, worn output shaft inside the transmission, worn transmission gears, or faulty shifting mechanism, require immediate attention. It is essential to visit a 4S shop or a professional auto repair shop for technician repairs.

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What are the vehicle warning lights?

There are ten main warning lights: 1. Oil pressure warning light: When illuminated, it indicates the engine oil level or pressure is below standard. Continued driving may cause severe engine wear due to lack of lubrication. 2. Coolant temperature warning light: Displays the temperature of the engine coolant. 3. Engine malfunction light: Shows the engine's operational status, typically in yellow. It lights up during ignition self-check and should turn off after starting. Persistent illumination indicates potential engine system issues. 4. Brake system warning light: If illuminated, first ensure the parking brake is fully released. If it remains lit, check brake fluid level or pad thickness. 5. Power steering warning light: Indicates malfunction in the power steering system. 6. Door/hood open warning light: Warns if doors or hood aren't properly closed. 7. Tire pressure monitoring light: Signals low tire pressure or possible tire damage. 8. Battery warning light: Usually yellow, it should turn off after self-check. 9. ABS warning light: Primarily yellow, failure to light during self-check or persistent illumination indicates potential ABS system faults. 10. Electronic stability control light: Normally indicates system deactivation when lit, and activation when off.

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Should the Foot Always Be on the Brake in an Automatic Transmission?

In an automatic transmission, the foot should not always be on the brake. It is best for the driver to keep the foot in the middle behind the brake and accelerator pedals. Below are specific details about the driver's foot placement: 1. Right Foot: The right foot should always be placed in the middle behind the brake and accelerator pedals. This makes it easier to step on the brake in case of an emergency and also facilitates acceleration. Tilting to the right is the accelerator pedal, while stepping straight down is the brake pedal. 2. Precautions: Do not use the left foot for braking and the right foot for acceleration, as this may lead to simultaneous pressing, wasting fuel and making operation difficult. 3. Correct Movement: The standard way to press the accelerator and brake is to pivot the heel of the right foot and rotate left or right to press, keeping the heel on the ground.

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Can the exterior differences between 730 and 740 be identified?

What lights should you turn on when driving in a heavy rainstorm?

What Causes Rough Gear Shifting in Automatic Transmissions?

Symptoms of a Faulty Thermostat in Jetta?

What Causes the Noise When Shifting Gears in an Automatic Transmission?

What are the vehicle warning lights?

Should the Foot Always Be on the Brake in an Automatic Transmission?

How to activate the one-touch window up/down function for Changan CS75?

Which is Safer: Automatic or Manual Transmission?

What Does the Driver's License Test Cover?

Automatic Transmission: Use 92 or 95 Octane?