What are the five must-do items for car maintenance?

What to do if the fuel tank cap of Mercedes-Benz GLE won't open?

This situation is relatively common. You can insert a small wooden piece into the gap of the fuel tank cap to pry it open. Remember to pull the fuel tank cap's latch switch while prying. You can open the trunk. On the side of the fuel tank cap, there is usually an interior panel that can be opened, typically secured with just a few plastic clips, making it easy to access. You can install a small spring (not too soft or too long) on the protruding rubber pad of the fuel tank to increase the elasticity between the fuel tank cap and the locking mechanism. Apply lubricating grease to the hinges and the engagement points of the fuel tank cap.

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How is the oil film on the windshield formed?

Reasons for the formation of oil film on car glass: automobile exhaust, oil smoke pollution, as well as insect carcasses, bird droppings, resin, or fruit jam. The oil film is a layer of oily substance formed by various pollutants adhering to the surface of the car glass. This layer is extremely stubborn and generally difficult to remove. However, if not treated in time, it will inevitably affect driving. Causes of oil film formation: Automobile exhaust: Automobile exhaust can adhere to the car glass, forming an oil film. Oil smoke pollution: If oil smoke and dirt are not treated for a long time, they will form oil stains. Insect carcasses, bird droppings, tree gum, or fruit jam: Insect carcasses and bird droppings are highly corrosive. If not cleaned from the glass, they will adhere and harden, turning into an oil film. Methods to remove oil film: Use a dedicated oil film cleaner, spray the cleaner evenly on the glass, and clean and wipe it with a car wash towel or sponge. Use toothpaste for cleaning. Toothpaste contains abrasive particles that can have a grinding effect. Evenly applying it to the glass can clean the surface pores of the glass and remove the oil film. Use an eraser, car wash clay, or newspaper for wiping and cleaning. The eraser and car wash clay can remove the oil film, while newspaper has a certain oil-absorbing effect. Dipping it in water and wiping repeatedly several times can also remove the oil film.

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What are the test items for the Category 2 driving test for small cars?

The Category 2 driving test for small cars includes reverse parking, hill start, parallel parking, curve driving, and right-angle turns. Below are the relevant details: 1. Mastering the basics: The Category 2 test requires learners to grasp the fundamental driving operations and possess basic vehicle control abilities. They must be proficient in basic methods of driving on the test site and roads, capable of properly using vehicle controls, accurately managing the vehicle's spatial position, and precisely controlling the vehicle's position, speed, and route. 2. Failing the test: If a candidate fails the Category 2 test, they must first pay a retest fee at the vehicle management office. According to Article 37 of the 'Regulations on the Application and Use of Motor Vehicle Driving Licenses,' each test can be taken once, and if failed, a retest is allowed once.

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What is the method for removing a timing belt?

Timing belt removal method: 1. Lift the car with a jack; 2. Remove the engine bottom plate; 3. After removing the bottom plate, the timing belt becomes visible; 4. Remove the exposed old timing belt; 5. Install a new timing belt; 6. Timing belt replacement completed. The function of the timing belt is to transmit the crankshaft's force to drive components such as the water pump and charging generator. The installation method for the timing belt is: 1. Loosen the generator fixing screw and the timing belt tension adjustment screw; 2. Push the generator towards the engine to minimize the distance between the timing pulleys, then properly position the timing belt; 3. Adjust the timing belt tension to the appropriate level, and tighten the engine fixing screw and adjustment screw.

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How is the matching between car gears and speed?

Car gear and speed matching involves starting in first gear, shifting to second gear at around 10 km/h, third gear at 20 km/h, fourth gear at 45 km/h, and fifth gear at 60 km/h. When the speed corresponds to the gear, the car's operating performance is at its best, and the thermal efficiency of the fuel is highest. If the speed does not match the gear, such as high speed with low gear or low speed with high gear, it not only increases fuel consumption but also causes damage to the engine and transmission, leading to irreversible harm to the vehicle. Therefore, it is essential to maintain the appropriate gear and speed matching while driving. Notes on gear shifting: For beginners, in addition to mastering the timing of gear shifting as quickly as possible, it is also necessary to learn the hand gestures for shifting. When shifting gears, keep the five fingers together, lightly grip the gear knob, and use the forearm to guide the hand in shifting. Be gentle and slow when shifting, avoiding excessive force to prevent shifting into the wrong gear. Always pause in neutral before shifting, and if you shift into the wrong gear, don’t panic—simply return to the original gear and shift again. Introduction to automatic transmission gears: Automatic transmission gears include P (Park), R (Reverse), N (Neutral), D (Drive), and B (Brake). P is for parking and is used for long-term parking, R is for reversing, N is neutral and used for short stops like at traffic lights, D is the automatic driving gear where the computer shifts gears automatically, and B is the braking gear.

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Will water enter if there is a gap in the rearview mirror housing?

Water can enter if there is a gap in the rearview mirror housing. The adjustment method for the rearview mirror is as follows: 1. Adjust the horizon reflection in the left rearview mirror to the center of the mirror; 2. Adjust the reflection of the left side of the vehicle to occupy the right quarter of the mirror; 3. Adjust the horizon reflection in the right rearview mirror to two-thirds of the mirror's height; 4. Adjust the reflection of the right side of the vehicle to occupy the left quarter of the mirror. The function of the rearview mirror is to reflect the conditions behind, beside, and below the vehicle, allowing the driver to indirectly see these areas clearly, expanding the driver's field of vision, and enhancing safety during reversing and driving.

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What are the five must-do items for car maintenance?

What to do if the fuel tank cap of Mercedes-Benz GLE won't open?

How is the oil film on the windshield formed?

What are the test items for the Category 2 driving test for small cars?

What is the method for removing a timing belt?

How is the matching between car gears and speed?

Will water enter if there is a gap in the rearview mirror housing?

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