I put 'your'; do suo/sua/suoi/sue have to capitalised in the same way as lei for this meaning?
Isn't this defined as "vehicle" in the vocabulary lesson?
I wouldn't use vehicle for car, both because "veicolo" is the perfectly fine Italian translation and because car isn't the only vehicle. It must have been a Duolingo error in the earlier lessons, automobile (or auto, or macchina) means car.
How do i type accents?
Install the Italian keyboard on your phone