Bmw 318i 1995年 我有d野想請教一下

My 94' BMW 325i has the exact same light and button.....

1. Key fob - mine is a square one but also got 3 buttons -
a. top one is for lock/unlock (yours should be the biggest one on top)
b. 2nd button is to arm the alarm (you will hear 2 beep sounds after you press)
c. the last button is the so-called panic key - to trigger the alarm with single beep sound for you to locate your car.

Regarding the green light in front of the gear box -
I think it is the alarm indicator, after you armed the vehicle and locked up, the light should turn red and start blinking (that's what mine is), when you are inside the car, it should be green (alarm deactivated).

That location is originally designed for the "automatic stability control + traction". But I am not sure if your car is equipped with that option.

ur key remote is not original bmw key chain. i think no one really can't answer your question.
if 1 button is for opening the doors, then there could be 1 button for the alarm to sound. and the last button is not use.
just a guess, since it's not original

the red button in your car is not original either. so, could be for anything. but it looks like for the alarm or tire pressure check.
again, just a guess.