I would add a jumpstart kit and/or cables, preferably with the knowledge of how to use them safely. (Even teslas occasionally need to be jumped.) On long drive

I would add a jumpstart kit and/or cables, preferably with the knowledge of how to use them safely. (Even teslas occasionally need to be jumped.) On long drives I also bring a small fire extinguisher (I take the one from my kitchen). Never had to use it but you don't need it until you do.