Are there records for taking the subject one test twice?

What documents are needed for car pickup?

You need to bring your ID card, a copy of your ID card, and your driver's license. No other documents are required. The documents and receipts you should have after purchasing a new car include: the vehicle registration certificate, the invoice from the purchase, the insurance policy, the vehicle registration certificate, the vehicle qualification certificate, the purchase tax receipt, the annual inspection, and the compulsory insurance label. Precautions for car pickup: First, visually inspect the body paint to check for scratches, spots, dents, and wear. Observe the paint under sufficient sunlight to see if there is any color difference. Open the door and push it from several angles to let light shine from different directions to check if the sheet metal is smooth and if there are any signs of repair. Check the vehicle nameplate. The car nameplate is located on the side of the driver's door or in the engine compartment. Pay attention to whether the manufacturing date is too far in the past. Generally, if the time exceeds six months, the car is likely to be a stock car or a test drive car. Also, the information on the vehicle nameplate should match the vehicle qualification certificate. Check the windshield. As shown in the figure, the numbers represent the most recent production year, and the dots represent the production month. If the dots are on the left side of the number, it means production in the first half of the year. Subtract the number of black dots from 7 to get the specific year. If the dots are on the right side of the number, it means production in the second half of the year. Subtract the number of black dots from 13 to get the specific year. Check the basic functions of the vehicle, such as whether the windows can be raised and lowered normally, whether the air conditioning is cooling, whether there is any odor from the vents, whether the functions of the central console are operating normally, whether the wipers are working properly, whether the sunroof can open and close normally, etc. Test run the vehicle. If you are allowed to start the engine, observe whether the engine idles smoothly, whether the steering wheel shakes noticeably, whether the front and rear seats vibrate noticeably, and whether there is any noticeable noise inside the car, etc.

1

0

Share

What is the method to reset the Mercedes-Benz window lift switch?

Mercedes-Benz window lift switch reset method is: 1. Open the driver's door of the Mercedes-Benz; 2. Depress the brake pedal of the Mercedes-Benz and start the engine; 3. Press the one-touch start button of the Mercedes-Benz; 4. All dashboard lights of the Mercedes-Benz will illuminate, and the engine will start; 5. Lift the window lift switch manually to fully raise the window, then hold the window lift switch without releasing it for more than 10 seconds. Taking the 2021 Mercedes-Benz A180 as an example, it belongs to the compact car category, with body dimensions of: length 4419mm, width 1796mm, height 1432mm, and a wheelbase of 2729mm. The 2021 Mercedes-Benz A180 features a front suspension of MacPherson strut independent suspension and a rear suspension of torsion beam non-independent suspension. It is equipped with a 1.3L turbocharged engine, delivering a maximum horsepower of 136PS, maximum power of 100kW, and maximum torque of 200Nm, paired with a 7-speed dual-clutch transmission.

12

3

Share

What is the reason for the AC light not turning on?

The reasons for the AC light not turning on are: 1. The AC switch is burnt out; 2. The fuse is blown. The AC in a car's air conditioning system refers to the air conditioning compressor switch. When the AC button is pressed, the cooling system of the air conditioning compressor will operate. The car's AC button is located below the display screen, and its functions include: adjusting and controlling the temperature, humidity, air cleanliness, and airflow state inside the car cabin. How to use the car air conditioning AC: 1. Start the car engine after getting in; 2. Turn on the car's AC button; 3. Rotate the fan button to adjust the air volume and select the cooling or heating intensity. Precautions for using the air conditioning include: 1. Do not set the temperature too low; 2. Control the direction of the air outlet; 3. Avoid prolonged use; 4. Appropriately turn on high air volume; 5. Turn off the air conditioning when driving at low speeds.

5

Share

Where is the DPF regeneration switch for the Great Wall Cannon?

The DPF regeneration switch for the Great Wall Cannon is located behind the steering wheel. Taking the 2020 Great Wall Cannon as an example, it is a pickup truck with the following dimensions: length 5437mm, width 1958mm, height 1893mm, wheelbase 3230mm, minimum ground clearance 228mm, and fuel tank capacity 80L. The 2020 Great Wall Cannon is equipped with a 2.0T turbocharged engine, delivering a maximum horsepower of 190PS, maximum torque of 360Nm, and maximum power of 140kW. The front suspension is a double-wishbone independent suspension, while the rear suspension is a multi-link solid axle non-independent suspension. The drivetrain features front-engine four-wheel drive, paired with an 8-speed automatic transmission.

8

1

Share

Should the Old Tiguan Use 95 or 92 Octane Gasoline?

The old Tiguan should use 95 octane gasoline, as this is the fuel grade officially recommended in the vehicle's user manual. In addition to checking the appropriate gasoline grade in the user manual, the old Tiguan also has this information indicated on the fuel tank cap. The fuel grade can usually be determined based on the engine's compression ratio. Vehicles with a compression ratio between 8.6-9.9 should use 92 octane gasoline, while those with a compression ratio between 10.0-11.5 should use 95 octane gasoline. If the compression ratio is even higher, 98 octane gasoline is recommended. However, with the application of new technologies, the compression ratio alone cannot determine the required gasoline grade, as high-compression engines can also be tuned to use lower-octane fuel. Factors such as ignition timing, turbocharging technology, and Atkinson cycle technology also play a role. Generally, the higher the gasoline grade, the higher the octane number and the better the anti-knock performance. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. If the old Tiguan occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the tank is empty. However, long-term use of the wrong gasoline grade can have the following effects: For vehicles designed for lower-octane fuel, using higher-octane gasoline 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 designed for higher-octane fuel, using lower-octane gasoline can cause engine knocking. Due to the significantly lower octane number, the fuel may ignite prematurely during the compression stroke, creating resistance before the spark plug fires. This resistance can make the engine run very unstably. Mild knocking may only increase noise without obvious engine damage, but severe knocking indicates serious engine issues, affecting driving stability and causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring.

19

0

Share

What are the steps for using an automatic transmission fluid exchanger?

Steps for using an automatic transmission fluid exchanger: 1. Locate the vehicle's external exchanger connection port; 2. Identify the inlet and outlet hoses of the connection port; 3. Connect the exchanger's hoses to the machine and fill the container with automatic transmission fluid. Functions of the transmission: 1. Alter gear ratios to meet varying traction requirements under different driving conditions; 2. Enable reverse driving; 3. Interrupt power transmission to the drive wheels during engine startup, idling, gear shifting, or when stopping power output. Methods for troubleshooting automatic transmission issues: 1. Perform computer diagnostics and replace faulty electronic components; 2. Repair damaged mechanical components; 3. Inspect the engine and ABS system, repairing any defective parts; 4. Systematically analyze potential causes including high engine coolant temperature, transmission clutch slippage, insufficient cooling, or blocked vehicle cooling grilles. Functions of the transmission: 1. Change gear ratios to accommodate different traction needs; 2. Allow reverse movement; 3. Disengage power transmission to drive wheels during engine start, idle, gear changes, or when stopping power output.

2

4

Share

Are there records for taking the subject one test twice?

What documents are needed for car pickup?

What is the method to reset the Mercedes-Benz window lift switch?

What is the reason for the AC light not turning on?

Where is the DPF regeneration switch for the Great Wall Cannon?

Should the Old Tiguan Use 95 or 92 Octane Gasoline?

What are the steps for using an automatic transmission fluid exchanger?

What Materials Are Used to Make Tires?

What Causes the Door to Show as Unclosed When It's Actually Shut Tight?

Can a 1 cm screw puncture a tire?

How to Apply for an Electronic Inspection Exemption Label?