Skip Carplay, you can add it yourself later through the ConnectedDrive screen if you change your mind. IMHO it's not worth it unless you are absolutely enthralled with using Apple's stuff and
only Apple's stuff for entertainment. (It plays well with Apple music, but not so great with everything else. Can't use Waze or Google Maps. Etc etc...)
And as far as kidney grilles and that sort of stuff, add it later yourself or take it to the dealer to have them do it... then you have the old parts you can sell off to someone who has lost their originals or whatnot.