How to Replace the Battery in a Mercedes-Benz E320-4MATIC Key?

What are the effects of refueling without turning off the engine?

The effects of refueling without turning off the engine are: 1. It poses a safety hazard, as short circuits or sparks may occur, which can easily cause a fire; 2. It generates a large amount of heat that is difficult to dissipate, and the sparks produced by the running engine may ignite and explode the fuel; 3. The exhaust gases may contain sparks that mix with gasoline molecules in the air and ignite, leading to a fire. Precautions to take when refueling include: 1. Do not use communication devices; 2. No smoking; 3. Avoid refueling when the low fuel warning light is on; 4. Do not fill the tank completely; 5. Avoid refueling during thunderstorms; 6. Do not re-enter the vehicle while refueling.

20

2

Share

What are the differences between the Audi Q8 and Q7?

The differences between the Audi Q8 and Q7 are as follows: 1. In terms of positioning and appearance, both models are mid-to-large-sized SUVs emphasizing comfort, with the Audi Q8 being the flagship SUV of Audi. The exterior design of the Audi Q8 highlights a more sporty feel compared to the Audi Q7. The Audi Q7 appears more mature and stable than the Q8. 2. Regarding body dimensions, the Audi Q7 is larger than the Audi Q8. The Audi Q8 measures 5006mm in length, 1995mm in width, and 1704mm in height; the Audi Q7 measures 5067mm in length, 1970mm in width, and 1712mm in height. The wheelbase of the Audi Q8 is 2995mm, while the Audi Q7 has a wheelbase of 2999mm. 3. In terms of combined fuel consumption, the Audi Q8 ranges between 8.9 to 9 liters per 100 kilometers; the Audi Q7 ranges between 8.8 to 9.3 liters per 100 kilometers. 4. The Audi Q7 offers five configurations to choose from, including two with a 2.0T engine and three with a 3.0T engine. The Audi Q8 has six configurations, with two featuring a 2.0T engine and four featuring a 3.0T engine. The Audi Q8 3.0T models come equipped with a premium brand audio system, and the number of speakers is increased to 23, reaching the standard of a home theater, which is more than the Q7's 11 speakers.

17

1

Share

What Causes a Car to Overheat After a Cold Start?

The reasons for a car overheating after a cold start are: 1. Influence of high-temperature weather; 2. Overloading of the air conditioning system and failure of cooling components; 3. Leakage in the radiator; 4. Insufficient or deteriorated coolant; 5. Blockage in the coolant circulation system; 6. Thermostat failure; 7. Engine water pump failure. The methods to address overheating after a cold start are: 1. Pull over and let the engine idle for a while; 2. Cool down the radiator with water before turning off the engine and replacing the belt; 3. After the engine has completely cooled down, replace the hose and add coolant. 'Car overheating' refers to a situation where the engine's operating temperature exceeds the normal working temperature, affecting the machine's normal operation and potentially causing damage.

7

2

Share

How much engine oil should be added to a BMW 520?

BMW 520 requires approximately 4.5 liters of engine oil. The method for adding engine oil is as follows: 1. Remove the engine oil cap; 2. Lift the vehicle using a jack; 3. Loosen the oil drain plug on the oil pan and drain the oil; 4. Tighten the plug after draining and add new engine oil. Taking the 2017 BMW 520 Classic as an example, it belongs to the mid-to-large-sized car category with the following dimensions: length 5055mm, width 1860mm, height 1491mm, wheelbase 3108mm, and a fuel tank capacity of 70 liters. It is equipped with a 2.0T turbocharged engine, delivering a maximum power of 135kW at 5000rpm.

19

2

Share

What Does It Mean When the Car Engine's Yellow Light Comes On?

When the car engine's yellow light comes on, it indicates a fault in the engine. The reasons for the light coming on include: 1. Damaged coolant temperature gauge and air flow meter; 2. Poor engine maintenance; 3. Damaged intake air temperature sensor and oxygen sensor; 4. Use of poor-quality fuel; 5. Faulty spark plugs and ignition coils; 6. Fuel pump failure or clogged fuel lines; 7. Dirty air filter. The solutions for the engine's yellow light coming on are: 1. Replace the coolant temperature gauge and air flow meter; 2. Perform timely engine maintenance; 3. Replace the intake air temperature sensor and oxygen sensor; 4. Switch to higher-grade fuel; 5. Replace the spark plugs and ignition coils.

4

3

Share

Can Spark Plugs Affect Fuel Consumption?

Spark plugs do affect fuel consumption. If a spark plug is damaged, it can directly lead to increased fuel consumption in the vehicle. Methods to determine if a spark plug is damaged: Remove the spark plug and observe its condition based on the following appearance and color. A normal spark plug's insulator skirt and electrode should appear gray-white, gray-yellow, or light brown. A properly functioning spark plug's insulator skirt is reddish-brown, with an electrode gap between 0.8-0.9mm and no signs of electrode burn. If the spark plug has oil stains or deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, showing signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates the wrong heat range was selected or the air-fuel mixture is too rich, with oil creeping up. Steps to replace a spark plug: Open the hood, lift the engine's plastic cover, and remove the high-voltage wires. Mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for external debris like leaves or dust and ensure everything is cleaned thoroughly. Place the new spark plug into the spark plug hole, hand-tighten it a few turns, and then use the socket to tighten it further. Reinstall the high-voltage wires in the correct firing order and reattach the cover.

8

3

Share

How to Replace the Battery in a Mercedes-Benz E320-4MATIC Key?

What are the effects of refueling without turning off the engine?

What are the differences between the Audi Q8 and Q7?

What Causes a Car to Overheat After a Cold Start?

How much engine oil should be added to a BMW 520?

What Does It Mean When the Car Engine's Yellow Light Comes On?

Can Spark Plugs Affect Fuel Consumption?

Is the Atenza equipped with a full-size spare tire?

What cars start with the letter C?

How to Wash Tires to Make Them Black Again?

What is the emission standard for the 2013 Buick Excelle?