What is the body length of the 2019 Bora?

What is the standard tire pressure for sedans in summer?

In summer, the normal tire pressure for sedans is between 2.3 and 2.5. If the car is fully loaded with 5 passengers, it is more suitable to adjust the tire pressure to around 2.5; if there are generally only two passengers, a tire pressure of 2.3 is normal. Hazards of excessive tire pressure: The friction and adhesion of the tires will decrease, affecting braking performance; It can cause steering wheel vibration and deviation, reducing driving comfort; It accelerates localized wear on the central tread pattern of the tire, shortening the tire's lifespan; Increased body vibration indirectly affects the lifespan of other components; Excessive stretching deformation of the tire cords can reduce the elasticity of the tire body, increasing the load on the car during driving; Reduced puncture resistance. When encountering sharp objects like nails or glass on the road, they can easily penetrate the tire, causing internal cracks or blowouts. Hazards of insufficient tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; It can make the steering wheel heavy and prone to deviation, creating unsafe driving conditions; Increased movement of various parts of the tire, causing abnormal heat due to excessive rolling; Reduced functionality of the cords and rubber, leading to delamination or cord breakage, and excessive friction with the rim, causing damage to the bead area and abnormal wear; The friction between the tire and the ground increases exponentially, rapidly raising tire temperature, softening the tire, and drastically reducing its strength. High-speed driving may lead to blowouts; Increased deformation of the tire body, making the sidewalls prone to cracks and generating flexing motion, leading to excessive heat, rubber aging, cord fatigue, and breakage, as well as increased tire contact area, accelerating shoulder wear.

17

0

Share

Do You Need to Use Turn Signals for Reversing into the Garage in Subject 2?

Subject 2 reversing into the garage or exiting the garage does not require the use of turn signals. There are six instances in Subject 2 where turn signals are required: When starting the vehicle, turn on the left turn signal; When starting on the slope, turn on the left turn signal; During parallel parking, turn on the right turn signal when the vehicle passes the side and prepares to park, stopping 30 cm from the edge before reversing; Before shifting into reverse gear during parallel parking, turn on the left turn signal because the steering wheel will be turned fully to the right during reversing, causing the front of the car to shift left; Before exiting the parking space during parallel parking, shift into drive and turn on the left turn signal, turning it off promptly after exiting; When entering the area for a right-angle turn, turn on the left turn signal and turn it off promptly after completing the turn. Penalties for incorrect use of turn signals are as follows: Failing to use or incorrectly using turn signals before starting, turning, changing lanes, overtaking, or parking results in a deduction of 10 points. Turning the steering wheel within less than 3 seconds of activating the turn signal before starting, turning, changing lanes, overtaking, or parking results in a deduction of 10 points. Subject 2 has a maximum score of 100 points, with evaluation criteria for failing, deducting 20 points, deducting 10 points, or deducting 5 points. The test is passed under the following conditions: ① For large passenger vehicles, tractors, city buses, medium-sized passenger vehicles, and large trucks, a score of 90 or above is required; ② For other vehicle types, a score of 80 or above is required. The C1 and C2 license tests include five mandatory items: reversing into the garage, parallel parking, slope parking and starting (C2 has been canceled), right-angle turns, and curve driving (commonly known as S-curves). Some regions also include a sixth item: high-speed card collection. The A1, A2, A3, B1, and B2 license tests include pile driving, slope parking and starting, parallel parking, single-plank bridge crossing, curve driving, right-angle turns, width-limited gate passing, continuous obstacle passing, bumpy road driving, narrow road U-turns, as well as simulated highway driving, continuous sharp mountain curves, tunnels, rainy (foggy) conditions, slippery roads, and emergency handling.

20

4

Share

What to Do If There Are Too Many Unhandled Traffic Violations?

When there are too many traffic violations, they must be handled according to the law, followed by retaking the test. If more than five violations remain unhandled and the vehicle is inspected by traffic police on-site, the vehicle will be detained until all violations are resolved. Regulations regarding accumulating 12 penalty points on a driver's license: Learning Relevant Legal Knowledge: Motor vehicle drivers must report to the traffic management department of the public security authority at the place where the driver's license was issued or where the violation occurred within 15 days to participate in a seven-day study of road traffic safety laws, regulations, and related knowledge. After completing the study, the vehicle management office must conduct a test on road traffic safety laws, regulations, and related knowledge within 20 days. Handling of Pass or Fail in the Test: If the test is passed, the penalty points will be cleared, and the driver's license will be returned. If the test is failed, the driver must continue studying and retake the test. If the driver refuses to participate in the study or take the test, the traffic management department of the public security authority will announce the suspension of the driver's license. Road Driving Skills Test: If a motor vehicle driver has two or more instances of reaching 12 points or accumulates 24 or more points within one scoring cycle, the vehicle management office must also conduct a road driving skills test within 10 days after the driver passes the road traffic safety laws, regulations, and related knowledge test. The road driving skills test will be conducted according to the highest permissible vehicle type specified on the driver's license.

14

5

Share

Are Diesel Vehicles Easy to Start in Winter?

In winter, due to excessively low temperatures, diesel vehicles may fail to start because of sudden temperature drops. Here are solutions for vehicle starting issues: 1. Choose the right fuel grade based on temperature: As temperatures drop, the diesel fuel in the vehicle should be promptly replaced according to the appropriate grade. Similar to gasoline, diesel also has different grades. However, while gasoline grades are determined by octane ratings, diesel grades are classified based on their freezing points. For example, 0-grade diesel has a freezing point of 0°C, meaning it will solidify around this temperature. Although diesel won't solidify before reaching this temperature, it will become more viscous, potentially clogging the fuel system's filter and making it difficult for the engine to receive fuel. Therefore, selecting the right diesel grade should primarily depend on the ambient temperature during use. 2. Proper preheating: Turn the vehicle key to the ON position and wait until the preheating indicator light (coil-shaped) on the dashboard goes off before starting the vehicle. When starting, depress the clutch pedal and limit the starting attempt to no more than 15 seconds (to avoid draining the battery or damaging the starter motor from prolonged cranking). If the vehicle doesn't start normally, repeat the above steps. 3. Correct use of anti-gel additives: In cases of sudden temperature drops, using diesel anti-gel additives is the best solution—convenient and economical. Adding diesel anti-gel additives to the fuel in the correct proportion can effectively prevent gelling and freezing, ensuring smooth vehicle operation. It's advisable to add diesel anti-gel additives in advance to prevent issues before they arise, ensuring preparedness. 4. Pay attention to antifreeze: Besides fuel, also consider lubricants and antifreeze. Low temperatures significantly increase the viscosity of lubricants, reducing adhesion and fluidity, which in turn greatly increases the resistance when starting the engine.

18

4

Share

How to Repair Car Paint by Yourself?

First, assess the extent of the paint scratch. Then, apply filler to the scratched area. Next, spray the scratched area with touch-up paint. Finally, the paint scratch repair is completed.

11

3

Share

Should the Mercedes-Benz S400 use 95 or 98 octane fuel?

According to the official vehicle manual recommendation, the Mercedes-Benz S400 should use 95 octane fuel. In addition to checking the appropriate fuel grade in the vehicle manual, the Mercedes-Benz S400 can also refer to the label on the fuel tank cap, which will indicate the recommended fuel type. Typically, the fuel grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92 octane fuel, while those with a compression ratio between 10.0-11.5 should use 95 octane fuel. However, with the application of new technologies, the compression ratio alone cannot determine the required fuel grade. High-compression engines can also be tuned to use lower-octane fuel, as factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the fuel octane rating, the higher the octane number and the better the anti-knock performance. 92 octane fuel contains 92% isooctane and 8% n-heptane, while 95 octane fuel contains 95% isooctane and 5% n-heptane. If the Mercedes-Benz S400 occasionally uses the wrong fuel grade, simply switch back to the correct grade after consumption. However, long-term use of the wrong fuel grade can have the following effects: For vehicles recommended to use lower-octane fuel, using higher-octane fuel will not cause damage, but the increased octane number may alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles recommended to use higher-octane fuel, using lower-octane fuel can cause engine knocking. Due to the significantly lower octane number, the fuel's ignition point decreases, causing premature ignition during the compression stroke. If combustion occurs before the spark plug fires, resistance will develop during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without significant engine damage, but severe knocking indicates serious engine conditions, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring.

19

3

Share

What is the body length of the 2019 Bora?

What is the standard tire pressure for sedans in summer?

Do You Need to Use Turn Signals for Reversing into the Garage in Subject 2?

What to Do If There Are Too Many Unhandled Traffic Violations?

Are Diesel Vehicles Easy to Start in Winter?

How to Repair Car Paint by Yourself?

Should the Mercedes-Benz S400 use 95 or 98 octane fuel?

How Many Times Can You Retake Motorcycle Subject 2 If You Fail?

Will crossing double solid lines for a U-turn definitely be captured by cameras?

What to Do If You Accidentally Scratched Someone Else's Car?

What Causes Car Windows to Fail to Open?