看看是否类似？

https://youtu.be/JArA7yxALQY

 

https://mbworld.org/forums/e-class-coupe-c207-cabrio-a207/566949-e250-can-t-start-key-not-detected.html

Bulletin LI80.61-P-049924 may be applicable ? 204/207/212 at times not possible to start engine via KG at same time ?Key not recognized? message appears. Normally, if a key is not correctly recognized during the first query of a Keyless-Go start process, the query is automatically repeated 1 more time. Due to a SW error in the Keyless-Go control unit, there is no engine start repeat function for certain keys ? update control unit software.

 

对于刹车液，估计你曾经加过。换新brake pads时，应该先吸出一些。

brake fluid对车漆腐蚀性很强。不妨检查溢出液是否进入附近的电路。