Fangrui Product Details Special Features:start Stop Cable For Romeo Stelvia 2017 -2021 Note: Due To Different Production Batches, The Labeling Is Random, Dont Accept The Specified . If You Mind, Please Do Not Take Pictures! ! ! ! Function: Close The Of Auto Start Stop Nstallation: 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. Dont The Button. The Button Light Turn Red Itself. The Default Setting Is That You Dont Have To Close The Stop Start Engine Function Manually Every Time. If You Want It For A Moment, The Off Button To Reactivate The Function 3 Modes Introduction: Auto-off Mode: Every Time The Car Is Started, The Start-stop Be Automatically Turned Off. If It Is Manually Turned On In The Middle, It Still Be Turned Off After The Car Is Turned Off And Locked. Memory Mode: Manually Switch The Start-stop Switch Once, And The Start-stop State Be Saved And Memorized, And Not B