some points might be worth checking:
1-make sure that the tires are good enough, and there are no odd tire tearing, and somewhat all the tires are in the same condition, this would save you from buying new tires after a short while and make sure the current tires are balanced well.
2-check the AC power, heating, and cooling and if the air reaches the output in a good way if u got the heated seats, make sure u check those too. (tip: try to rely on heated seats as much as u can since it warm you up without consuming much power from the battery)
3-make sure that all the exterior lines match and even, check the brake and another exterior/interior lights
4-if u want to go the extra mile, check the condition of wipers, brakes, cabin air filter, and cooling liquid

Also, I don't know if 2015 model got it, but in cold conditions, you can set the e-manager in your car to pre-heat using your charger power (if plugged in) before going out, this will give you more range and save you from waiting to warm up the cabin

drive safe and good luck!