Mercedes Benz C brake noise, Mercedes Benz C brake sound, what s going on

1. For C-class cars, the brake discs are all new, therefore, they need to be grinded open, and there will be abnormal noises on the brakes at this time, which are divided into vibration friction and sharp sounds. But it will disappear after a few hundred kilometers.

Solution: As long as there is a new car with abnormal brake noise, don't care about it.

Don't deviate, brake sharply, the vehicle doesn't shake, and it's okay if you don't deviate.

2. When the wind and sand weather or dust is heavy:

At this time, sand or dust particles will enter between the discs, causing the brakes to hiss. How to deal with it: Slam on the brakes a few times, or ignore him, and the sound will be gone in two days.

3. The brake pads are worn to the wear zone. There are hard point prompts, and at this time it is a slight sound.

When there is a hissing sound that continues to appear as soon as the brakes are repeated for several days, and it is getting louder and louder, the sound is getting denser and denser, it means that the brake pads are almost gone.

The brake pads generally have some hard metal chips at the bottom, which are deliberately put in, and when these chips are grinded, there will be a hissing sound of metal friction, which is to tell the owner that the brake pads are almost gone, and the brake pads should be replaced.

There is a very audible sound:

Reason: 1. The brake disc has a hard point, which is only the hard material at this point when it is manufactured, it doesn't matter, but the degree of wear of the piece is slow, and it will be fine if it is worn past this point. Your brake pads earned. The time of use is longer than the rest is the brake pads.

2. The disc is seriously worn, and there is a situation where the iron touches the iron, and there will be an obvious sound at this time.

Solve the problem: 1 If it is the cause of the hard point, the easiest way is to step on the hard point when the speed of the sports car is about 5 kilometers backwards, and you can generally remove the hard point. The sound is not too loud, it is recommended or ignored, and it has no effect on driving.

2. If it is iron-to-iron, the disc should be replaced immediately. In addition, at this time, the brake of the instrument does not alarm, and the sensor connected to the brake fault light should be checked at the same time.

There can be a variety of reasons for abnormal brake noise, generally including the following:

1. The run-in of the new car and the new replacement of brake pads lead to abnormal brake noise.

There is a run-in period for a new car or a new brake pad, and there will be some abnormal noises during the run-in period, which will be eliminated after the car has run for hundreds of kilometers.

2. The signal of the normal start of the ABS system.

When braking suddenly, the brake pedal may have a continuous sound similar to "pong", and sometimes there will be a "bounce" phenomenon. This is a phenomenon caused by the startup of the ABS system and is normal.

3. Serious wear of brake pads alarms.

When the brake pads are worn to the limit, the alarm pads will rub against the brake disc and produce a sharp sound, so it is necessary to replace the brake pads even if they are replaced to avoid accidents.

Mercedes-Benz brake abnormal noise fault mainly has the following points; 1. New car running-in. A new car or a brake disc that has just been replaced will have a run-in period, and there will inevitably be some abnormal noises during the run-in period, which will generally be eliminated after running hundreds of kilometers. 2. Normal start of ABS system.

When braking suddenly, the brake pedal will have a continuous "plop" sound, and sometimes there will be a phenomenon of springing feet, which indicates that the ABS system is started, which is a normal sound. 3. There will be metal hard spots in the brake pads, and there will be some fine metal particles inside the brake pads, and the brakes will make a sharp and piercing sound when you step on the brakes. 4. The brake pads are seriously worn, and the alarm starts.

Brake pads generally have alarm pads, when the brake pads are worn to the limit, the alarm pads will rub against the brake disc, giving rise to a sharp metal friction sound, at this time, the brake pads must be replaced in time to avoid scratching the brake disc and brake failure. 5. The brake disc is seriously worn. The wear of the brake disc will form a deep groove around the disc, and the friction between the brake pad and the edge of the groove will produce abnormal noise.

If the groove is not particularly deep, it can be solved by grinding the edge of the brake pad to avoid the friction between the brake pad and the edge of the groove, and if the groove is already deep, it is recommended to replace the brake disc. It is generally recommended to replace the brake disc after every two brake pad replacements. 6. For the assembly problem of brake pads, try to reinstall the brake pads and apply butter or special lubricating oil to the connection between the brake pads and the brake calipers.

It is also possible that the brake pads are installed in reverse and can be reassembled. Especially car owners who have replaced brake pads at roadside stalls should pay more attention to this. 7. The brake cylinder does not return, it is mostly the problem of the brake catheter, the rust in the brake catheter or the dirty lubricating oil will lead to poor return, clean the brake catheter, polish it with fine sandpaper and apply new lubricating oil.

It is also possible that there is a problem with the brake cylinder, and the brake cylinder needs to be replaced, but this kind of failure is relatively rare.

What should I do if the brakes make abnormal noises? Learn this trick to help you solve it easily!

The condition of your vehicle may be caused by the quality of the brake disc or brake pad itself, uneven wear of the brake disc or brake pad, and the wear of the brake pad to the limit. If the contact after-sales service has not been processed, you may wish to try to feedback the problem through the car quality network.

Abnormal brake noises are screams.

This kind of sound should first check whether the brake pads are about to grind out, if it is a new one, check whether there is any peculiar smell into it, and there is a possibility that it is caused by the high temperature of the brake pads, in those cases, we need to reinstall and check the brake pads.

Abnormal noises are hissing sounds.

There are many reasons for the hissing sound, calipers, brake pads, and discs will have an impact, and if the sound continues, first check whether there is a drag brake, that is to say, the brake pads of the vehicle cannot return normally after fitting the wheels. Then check whether there is any peculiar smell between the brake pads and the disc, and the new brake pads also need a run-in period, and the sound will disappear after a period of running-in.

It is difficult for ordinary car owners to distinguish which are fault abnormal noises and which are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that they lack their own understanding of mechanical knowledge, so they can distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the identification method of the sound of the stupid car of Qiye Bu:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, use a screw or other metal rod as a stestological instrument to contact the sound part of the mountain to amplify the sound, or use a single cylinder fire to reduce the sound to meet the needs of diagnosis. The auscultation site should be kept quiet to minimize human interference.

The reason why the Mercedes-Benz Sishan C brake will sound when stepped on is that the friction between the brake pads and the brake disc is caused by simple friction.

Solution: Both the C-Class car and the brake discs are new and need to be sharpened. At this time, there will be an abnormal sound of braking, which is divided into vibration friction sound and sharp silk sound. But it will disappear after a few hundred kilometers.

Solution: When the weather is windy or dusty, sand or dust particles can get between the brake discs, causing the brakes to hiss abnormally.

Solution: Generally, there are some hard and wide hand metal shavings at the bottom of the brake pads, which are deliberately put in. These chips make a metallic hissing sound when they are grinded, which tells the owner that the brake pads are running out and that it is time to replace them.

Solution: Suddenly the brake makes an abnormal noise, and the brake pedal feels the vibration. In this case, the anti-lock braking function of Mercedes-Benz ABS tires is activated, which occurs in the case of sudden braking. This situation can be ignored.

Millions of car purchase subsidies.

There are six abnormal noises when braking in the Mercedes C:

1.The brake disc is new: the brake makes an unusual noise.

Abnormal noise can be divided into vibration, friction and sharp noise. But it will disappear after a few hundred kilometers. How to deal with it:

As long as the braking sound of the new car is abnormal, there is no need to worry. If the vehicle suddenly turns and doesn't wobble, it's fine.

2.When it is windy or dusty: At this point, sand or dust particles can get between the brake discs, causing the brakes to hiss. What to do: Slam on the brakes, or let him go, and the noise will be gone in two days.

3.Brake pads are worn to the worn: there is a clear hint here.

There was a little noise at this time. When the brakes hiss for several days in a row, and the sound gets louder and louder, it means that the brake pads are running out. Generally, there is a hard metal scrap at the bottom of the brake pad, which is deliberately put in.

When these chips are grinded, they make a metallic grinding hiss, which means telling the owner that the brake pads are running out. At this point, the brake pads should be replaced. Notice the difference between sand or brake pads, i.e. the duration of the noise.

If there is a sound for a week or half a month in a row, and it is getting louder and louder, it is like a liquid car piece. Otherwise, it's something else. Do not change brake pads by mistake.

4.There is a gurgling sound when braking suddenly, and the brake pedal has a vibration sensation. Reason: In this case, the anti-lock braking function of Mercedes-Benz ABS tires is activated by a slow object, which occurs in the case of sudden braking. This situation can be ignored.

5.When braking, the vibrations grunt: wet weather or water on the brake discs, wet brake discs, this happens at low speeds.

6.There is a gurgling sound when braking suddenly, and the brake pedal feels vibrating: in this case, the anti-lock braking function of Mercedes-Benz ABS tires is activated, and there will be in the case of sudden braking. This situation can be ignored. Millions of car purchase subsidies.