中文翻译英文，不要有语法上的错误，翻译机翻译出来的不要

Before doing this test, we have to examine whether or not the docking is connecting to the minicooper's side, the switching system, and during S3/S3, whether or not there's interference, breaking sound.

To do this test, we need to detect Docking connected minicooper side, switch machines into the system, S3/S3, when there is no noise, breaking sound appears

做这个测试之前，我们需要检测Docking接在minicooper端，开关机进系统，S3/S3的时候，有没有杂音，破音出现。
Before doing this test, we need to detect that when the Docking connected to the minicooper end, switched machines into the system, S3/S3, if there is noise and breaking sound.