What are the benefits of Mercedes-Benz transmission oil?
The oil change of Mercedes-Benz gearbox should be every three years or every 60 thousand kilometers, whichever comes first;
Gearbox oil is the oil to keep the gear system clean, which can ensure the normal operation of the gearbox and prolong the service life of the transmission device.
Transmission oil can basically be used in automatic transmissions on the market. In fact, each automatic transmission has different technical requirements in design. Even if the same type of transmission is mounted on different models, its torque, weight, speed and structure will be different, so the original factory has its own designated special transmission oil. The difference of transmission oil is one of the reasons that affect the shift quality.
The fundamental difference lies in the difference of its friction system. HFM ATF has finer oil molecules and high shear resistance. The oil film acting on the surface of friction materials can play a very effective role in suspension and sliding in the semi-clutch state or at the moment of combination, which can cushion the strong impact at this moment, make the combination smoother and shift more smoothly. At the same time, fine oil molecules greatly reduce the phenomenon of valve sticking and make the valve body work more smoothly.
Gearbox oil is the oil to keep the gear system clean, which plays a role in lubricating and prolonging the service life of transmission device. It can resist low temperature, effectively lubricate even at low temperature, and reduce engine oil loss under harsh working conditions. Transmission oil can be divided into automatic transmission oil and manual transmission oil according to different transmission structures.
How to tell the true and false labels of Mercedes-Benz?
Hello, 1. LOGO is the most easily exposed fake watch, especially on the surface. You can observe its work carefully with a four-fold eyepiece. If the real metal LOGO is as bright as new, the fake LOGO has rough edges and some parts are irregular; If it is painted, the edge of the real watch is smooth and burr-free, the edge of the fake watch is slightly melted, and the font is deep and shallow, so it can be seen more clearly with an 8-fold eyepiece. (Longines, Centennial, Omega, Rolex and other watches are generally imitations. )
Two. Watch mirror
Famous watches generally use sapphire mirrors, and with the development of science and technology, fake watches have begun to follow suit.
Fake sapphire watches are generally easy to see through, because in order to reduce the cost, fake watches will not be coated with anti-reflection layer, and will not be coated with double layers, so they will reflect light seriously. Although the dripping water does not change, as long as it is irradiated with ultraviolet light, the reflection is extremely serious; Because of the anti-reflection coating, the real watch does not have much reflection under strong light, and there is purple or blue glare.
Three. weight
Nowadays, fake watches, especially J's Rolex, use lead rings to ensure the weight of fake watches, but you can try the weight of other parts, such as the watch chain, which is much lighter. At the same time, fake watches are generally light. Even if you use a lead ring to "ballast", it feels different in your hand.
4. Hold your head
Generally, the header of a fake table is the easiest to expose. The handles of fake watches all use the same process, and the polished coating is uneven, whether it is plated with grams or gold, but there are always different shades. If you look carefully, you can see the exposed part. If the genuine case is not easy to be detected, you can carefully observe the handle part. In addition, many famous watches have their own specifications, while fake watches are almost the same, so it is easy to see what the real watch looks like.
Verb (abbreviation of verb) back shell
Intransitive verbs word for word.
Literally, you can easily find the traces of handwriting with 8 times eyepiece.
Seven. number
Famous watch manufacturers have their own fixed labeling rules, and each watch has its own serial number. According to this number, you can find the specifications and models of the watch, even the date of production and the place of sale, while the fake watch only uses a number, or even no number, which is easy to distinguish.
Some real watch numbers appear in different positions of the watch, and the fake ones only appear on the back cover of the watch.
Eight. watch chain
The workmanship of the watch chain is obvious, and the manual mark must be a fake watch. Although some fake watchbands with butterfly buckles are exquisite, there are rough and unpolished details at the movable corners. As long as you are careful, you can find the flaw.
Nine. watch hand
If you carefully observe the prosthetic hand with an eyepiece, you can find tiny marks, which are tweezers marks left during installation, and you can't see similar marks in the real watch at all.
The hand shape of a watch is obviously different from that of a real watch. Even if I have seen a real J watch, the second hand can see the problem. The second hand of a fake watch is rough and short, which is the biggest problem. The second hand of a real watch is generally longer than or equal to the minute hand.
I have also seen fake blue steel hands, which are usually painted with pigments and feel a little transparent, while real blue steel is blue produced by metal hot working technology, which looks deeper and has less light refraction.
X. activities
Sound: Generally, except for the fake watches of Swiss movement 2824 and 2836, everything else is at the frequency of 2 1600. You just need to pick them up and listen. Almost everything is slow. At present, most real watches are above 28800 frequency, but there are also many real watches that swing slowly, so this is just one of them.
Polishing: Needless to say. Generally, fake watches are not polished. But now there are many fake movements with polishing on the market, but it is easy to find the roughness of processing with eyepiece.
Structure: (Each watch core has its own different structure, which ETA 2824 cannot imitate)
How to identify a watch?
1. Observe the case back cover. All original watches, especially men's watches, must be printed with many English letters on the back cover of the watch case, indicating the brand name of the watch, the country of manufacture, and the name of all-steel or semi-steel waterproof, antimagnetic, shockproof or shockproof device (see the English letter marks on the appearance of common watches later for details), and stamped with the trademark pattern dedicated to the watch brand. In addition, some numbers are engraved to indicate the movement number and case number of the watch. Most of the patterns and letters engraved on the back cover of counterfeit watches are thick and vague, and the case number and movement number are unknown. The back cover of original watches generally has a film, and the back cover of plum blossom watches has a green plum blossom label. Swiss-made gold-plated watch, the opening of the case is engraved with letters (opposite to the spring plate on which the strap is installed), such as PLAQUEGI0, indicating that the case is 10 micron gold-plated. Fake watches don't have this sign. Many counterfeit watches use titanium nitride and other processes to pretend to be gold-plated cases.
2. Dial. Every watch made in Japan has a row of small numbers printed at the bottom of the dial at 6 o'clock, indicating the movement and dial number. A fake watch won't. Some famous watches made in Switzerland, such as plum blossom and Ingrid, have some special marks on the dial. "Air Master" plum blossom men's watches are printed with the red letter TITOFLEX at the bottom of the dial, and most of them are inlaid with a glass or metal diamond. STARJEWEIS is printed on the lower part of Inge watch dial. There are no such letters on the dial of a fake watch. Although some counterfeit watches have sWISSMOVT letters printed on their dials, and shockproof watches have shockproof letters, there are usually many flaws and defects on the dials of these watches, such as incorrect dial characters, vague dividing line marks, loose letters and patterns of dial characters or trademarks, scratches, discoloration and shedding of luminous points on the dials, and the luminous points are added inside the dial characters to make them bigger. Some fake watches with daily and weekly calendars have the following characteristics: from the calendar window, the outer side of the calendar dial is tilted backwards, or the calendar dial is plastic. On the calendar disk, the week (except Japanese tables) is marked in Chinese, or the right side of the week is marked in English and the left side is marked with numbers.
3. Observe the watch handle. The trademark or letter mark of counterfeit watches is thick and fuzzy or printed with 100% W ~ P, and all-steel watches use semi-steel handles.
The English letters of common watches are marked as follows:
waterproof material
waterproof material
diamagnetic
All-stainless steel all-steel shell
Semi-steel case with stainless steel back
Made in Switzerland made in Switzerland
Made in Japan
Incabloc "ingabailu" shock absorber
PLAQUEG 10 10 micron gold plating
automatic watch
Jewels and diamonds
How to identify fake watches?
Watches are one of people's daily necessities. At present, watches with various brands, styles and functions on the market are dazzling. However, the prices of watches from different places and brands vary greatly, ranging from tens of yuan, hundreds of yuan to tens of thousands of yuan, making it difficult for consumers to choose. How to identify the authenticity of Swiss watches? Identify fake and shoddy watches from the following aspects.
Identify counterfeit watch brands.
Brand counterfeiting generally occurs in high-end well-known brands. In order to get high profits, counterfeiters often imitate the genuine products in terms of trademarks and appearance, which are exactly the same, impeccable at first glance, and even the packaging, instructions and production licenses are complete. However, the movement that does not conform to the brand is selected, or the parts are poorly selected. This fake brand-name watch is often sold internally, and the price is much lower than the real one. Watches are also sold in some cities with imperfect testing and irregular shopping malls. At one time, fake Rolex, radar, Fiyta and other watches appeared in the domestic market.
In order to increase sales, some watches make false propaganda about product functions, and the back cover is marked "waterproof 100 meters, and the case will never wear". For this kind of publicity, consumers must make rational judgments.
Identification of counterfeit appearance parts
At present, appearance parts account for a high proportion in the price of watches. For example, the "Cartier" watch made in France costs 3.52 million RMB and is inlaid with 36 carats of natural diamonds. If calculated at RMB 60,000 per carat, the value of diamonds alone will exceed RMB 2 million. So pay attention to the illusion part.
Identification of natural diamonds, synthetic diamonds and artificial diamonds (glass diamonds);
Natural diamond is the hardest of all objects, and it is rated as 10 hardness; The grade of synthetic diamonds is 8-9; Rhinestones (glass diamonds) are not as hard and fragile as natural diamonds and artificial diamonds. The prices of synthetic diamonds and rhinestones are very cheap, each as long as 0. 1-0.2 yuan. Therefore, when buying natural diamond watches, we must pay attention to the authenticity, and if necessary, we can go to relevant departments for testing.
Identification of K gold, gold plating and acid electroplating;
The surface colors of K gold, gold plating and acid gold plating are all yellow, so it is difficult to distinguish them without instrument testing. Some counterfeit products label the 10K gold shell as 18K gold shell, and some even pass the gold-plated shell off as a k gold shell. In addition, it is difficult to measure the thickness of the gold-plated layer of the gold-plated shell. Some watches are marked with 3 micron gold plating, but there is actually no 1 micron. After using the watch for more than a year, the gold color has completely faded. More importantly, the introduction of gold-plated acid aluminum alloy shell can ensure that it will not fade for several years. Less than half a year after actual use, gold turned black and even lost its rust-proof ability. Consumers must ask clearly when buying gold watches.
Distinguish glass:
At present, there are three kinds of watch glass: plexiglass, ordinary timely glass and sapphire crystal glass. Seasonal glass and sapphire crystal glass are easily confused and difficult to distinguish, and there are great differences in quality and price between them. Sapphire crystal glass was once called "glass that never wears", but now it is changed to "glass that does not wear easily". Its price is about dozens of times that of ordinary seasonal glass, so sapphire crystal glass is only used for high-end watches.
In the absence of testing instruments, a simple method can be used to distinguish ordinary timely glass from sapphire crystal glass. Drop a drop of water on the watch glass surface, and then stand them upright. Sapphire crystal glass is the kind in which water is spherical and does not disperse; Otherwise, ordinary seasonal glass is the kind where water diffuses along the surface.
Identify counterfeit watch movements.
The movement of imported Swiss watches must be made in Switzerland. If it is found that the movement used is made in Japan, China or other countries, then the watch is a fake and shoddy product.
The movement of imported Japanese watches must be made in Japan. If it is found that the movement used is made in Switzerland or other countries, the watch must also be a fake and shoddy product.
Domestic watches use a variety of movements, including Swiss, Japanese and domestic movements. Consumers should pay attention to this: some counterfeiters use some fake movements to package watches as inferior. Relatively speaking, if you buy a brand with high trust, these problems will not occur.
What are the benefits of Mercedes-Benz gearbox oil @20 19?