Don't know how about adding keys but I will never ever going to use xtool products for bmw for all keys lost I have x100 max what meant to be pro advanced key programmer done all keys lost for same bmw f10 with just ca4 module and it brick it could recover cos only autel got the option to do so I bought another cas4 module it brick it again it brick 5 of the cas4 modules in total for me just on the downgrading cas4 and yes I did use battery stabilizer. I not recommend to use xtool on hi immo cars....believe it or not I bought cheap autel km100 and it's done the job very easy
Don't know how about adding keys but I will never ever going to use xtool products for bmw for all keys lost I have x100 max what meant to be pro advanced key programmer done all keys lost for same bmw f10 with just ca4 module and it brick it could recover cos only autel got the option to do so I bought another cas4 module it brick it again it brick 5 of the cas4 modules in total for me just on the downgrading cas4 and yes I did use battery stabilizer. I not recommend to use xtool on hi immo cars....believe it or not I bought cheap autel km100 and it's done the job very easy