How to assemble Mercedes BE key PCB + case?

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Instruction: This how to assemble the case with Mercedes BE key pcb

1. Put the Xhorse VVDI BE key PCB into the case.
2. Cover the bottom case.
3. Insert the battery and cover the case.
4. Push the metal strips on both sides into the right position.
If the rear metal component is first assembled, then the metal strips on both sides won’t be able to pushed into the right position.
5. Here rearmetal button.
6.Put into the small key and start button.If you want to disassemble the case, please do it from the last step to the first step.