lucky it's not me!
Glad I didn't try installing the red start/stop button myself. Alfa dealer just called and said a clip broke during the install and they have to special order it. Thye hope to get the part on Friday. Arghhh.... I miss my Stelvio!!I found this over on the Giulia forum. This might help for those considering it (like ME!)
Diy: Alfa romeo giulia & alfa romeo stelvio stop/start ignition switch replacement - Alfa Romeo Giulia Forum