Question: how do i know if it is fit my car or not?
Answer: Only your car "A off" Button is same as our website " A off" button, than fit.

Attention: This products function is Close Stop Start Engine System, your original car must have "A off"  button,than can use. if your car haven't "A off" button, cann't fit for your car.

Installation: Please turn off the power of the car before installation.Remove the panel with tool and connect the cable between factory socket and button socket.
Setting: After installation, start the engine while stepping on brake pedal, observe for 3-6 seconds. Don't press the button. The button light will turn red itself. The default setting is that you don't have to close the stop start engine function manually every time. If you want it for a moment, press the off button to reactivate the function.
Memory mode:
1. Turn off the auto stop (light on), wait for 3 seconds.
2. Press the button 3 times (light off), wait till the light on.
3. Press the button twice (light on), wait till light off, it goes to memory mode.

Note:
1).The items may be different from our pictures according to different car styles, but the function is the same.
2).Please make sure it is fit your car before you purchase,if you are not sure,please contact us,thanks