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Benz key matching method

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Update time : 2020-10-26 14:41:59
First, there are two types of keys, the first is a folding key with a chip. This kind of key is mostly used in very early Mercedes-Benz cars. The chip model is 7935, which is rarely seen now. The second is the infrared key, which is the most common now. The first generation of infrared keys began to be available around 99 years ago.

Then, use the principle of infrared code to open and close the anti-theft system. There is a password SSID in the key, which is prepared through the EIS of the lock. When the infrared SSID emitted by the key is consistent with the EIS of the lock, the lock will be closed and opened to release the anti-theft. This is a simple principle. So when matching the key, you need to read the lock data, calculate the key data, and then write the data into the key.

Then, just read the lock data, calculate the key data through the software, and then write the data into the key to be OK. The first step is to remove the lock, open it, and read the data with the programmer wiring. Of course, some devices can now read EIS data without disassembly.

Then, you can choose to use Digital Master D3 to read its CPU data, blow down the entire CPU with an air gun, the model is: mask 4J74Y, weld the entire CPU to the D3 adapter seat, and read the data.

Then, friends with XP programmers can also use XP to read, but ensure stable performance, otherwise it is easy to lose data. No matter what device you use, as long as it can read EIS data. After reading out the data, we save the data in BIN format to prepare for the next step.

Finally, after having the data, use the key calculator MB BENZ key calculation tool (SKC) to calculate the key data from the EIS lock data. Connect the PC to the Mercedes-Benz key calculator, open the software, and confirm that the device has been connected.
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