What is the temperature threshold for a cold start of an engine?

Is the 7 Series New Energy equipped with a 2.0T engine?

7 Series New Energy is equipped with a 2.0T engine. The 7 Series New Energy is a plug-in hybrid vehicle that uses a 2.0T engine, paired with an electric motor that delivers a maximum power of 83kW and a maximum torque of 250Nm. The 7 Series is a large luxury sedan under BMW, with dimensions of 5250mm in length, 1902mm in width, and 1498mm in height, and a wheelbase of 3210mm. Externally, the 7 Series features a new front grille and headlight assembly, with the iconic double-kidney grille being 40% larger than the previous model. The M760Li model is marked with a V12 badge on the C-pillar, and the side window edges are adorned with exclusive black trim.

10

1

Share

How to turn on the low beam lights on a Mercedes GLA?

On the Mercedes GLA, there is a set of light combination switches on the left side of the steering wheel. At night, rotating the combination switch forward one notch turns on the dashboard lights, and rotating it another notch turns on the low beam lights. The Mercedes GLA daytime running lights can be adjusted using a dedicated knob on the light control lever. More details are as follows: 1. The low beam lights should be turned on at night when there are streetlights on the road. They should also be turned on when encountering pedestrians on the roadside, as well as on narrow roads, narrow bridges, and curves. 2. When encountering oncoming traffic at night, if the high beam lights of the Mercedes GLA are on, they must be turned off until the oncoming vehicle has passed. If not turned off, the high beams can dazzle the other driver and potentially cause an accident. This is also a standard of civilized driving. 3. At night, when approaching an intersection, it is necessary to switch between high and low beams twice. However, constantly rotating the switch back and forth can be inconvenient. The Mercedes GLA combination switch has a shortcut: when in low beam mode, lifting the combination light switch upwards turns it into high beam mode. Releasing the switch returns it to low beam mode. This method is simple and convenient, especially useful for switching lights at intersections at night.

10

1

Share

Are Turbocharged Cars More Fuel-Efficient?

Turbocharged cars are not necessarily more fuel-efficient. The details are as follows: 1. Comparison of the same displacement: A 1.8L engine is definitely more fuel-efficient than a 1.8T engine. Turbocharging increases power by allowing more air into the engine to burn more fuel, so it inevitably consumes more fuel than a naturally aspirated engine. 2. Comparison of the same power: A 1.8T engine corresponds to a naturally aspirated engine of similar power, such as a 2.4L. However, the former still consumes fuel at the rate of a 1.8L engine at low speeds or in congested areas, making it more fuel-efficient compared to the latter's larger displacement naturally aspirated engine. Precautions for using turbocharging: 1. Poor fuel quality: When the engine uses poor-quality fuel, some of the fuel does not burn completely and turns into particles that pass through the exhaust system, adhering to the turbo blades. Over time, this can cause damage to the turbo blades. 2. Engine carbon deposit cleaning: When cleaning carbon deposits, these deposits are expelled from the engine in particle form along with the exhaust gas and adhere to the turbo blades, increasing the turbo's load. Gradually, this can damage the bearings and blades in that area.

8

2

Share

How many liters of brake fluid need to be replaced?

Brake fluid needs to be replaced with 1 liter. When replacing, it is necessary to use brake fluid of the same grade as the original vehicle, which is indicated on the brake fluid cap. Here is some relevant information about brake fluid: 1. When replacing brake fluid, pay attention to the brake fluid model marked on the brake fluid reservoir cap. Different vehicle models use different types of brake fluid. Currently, most models use DOT-4 or DOT-5 brake fluid. 2. The replacement interval for brake fluid also depends on the climate and humidity of the region where the vehicle is located: in tropical regions, replace annually or every 20,000 kilometers; in cold regions, replace every 2 years or 40,000 kilometers; in temperate regions, replace every 3 years or 60,000 kilometers.

6

1

Share

Which is Better: Electronic Parking Brake or Hand Brake?

Electronic parking brakes and hand brakes each have their own advantages. The specific differences between the two are as follows: 1. Space occupation: Hand brakes occupy more space; electronic parking brakes are aesthetically pleasing, convenient, and space-saving. 2. Functionality: Hand brakes can be used for drifting maneuvers; electronic parking brakes cannot perform drifting. 3. Control system: Hand brakes are not affected by the battery; electronic parking brakes may malfunction or fail when the battery is not working properly. Below is an introduction to hand brakes: The professional term for a hand brake is an auxiliary brake, which operates differently from the main brake system. It uses a steel cable connected to the rear brake shoes to apply braking force to the vehicle. Prolonged use of the hand brake can cause the steel cable to undergo plastic deformation. Since this deformation is irreversible, long-term use can reduce its effectiveness.

14

1

Share

What is the appropriate pressure for automotive air conditioning refrigerant?

Automotive air conditioning refrigerant pressure specifics are as follows: 1. Under compressor operation at 1500~2000rpm, the high pressure (discharge pressure) should be around 1.5~2.0mpa, and the low pressure (suction pressure) around 0.15~0.35mpa for normal operation. The exact values depend on different vehicle air conditioning system configurations and ambient temperatures. 2. At idle speed (engine 700~900rpm), if the ambient temperature is high, such as under direct summer sunlight, the high pressure may be slightly higher, reaching up to approximately 2.5~2.8mpa, but generally should not exceed 3.1mpa.

7

5

Share

What is the temperature threshold for a cold start of an engine?

Is the 7 Series New Energy equipped with a 2.0T engine?

How to turn on the low beam lights on a Mercedes GLA?

Are Turbocharged Cars More Fuel-Efficient?

How many liters of brake fluid need to be replaced?

Which is Better: Electronic Parking Brake or Hand Brake?

What is the appropriate pressure for automotive air conditioning refrigerant?

What happens when a car battery is low on power?

What Causes Water in Diesel Engine Oil?

Why Choose Accord Over Teana?

How to Check Tire Production Date When Taking Delivery of a Car?