I've spent the last 10 minutes or so trying to think of a good enough answer for this ... all that springs to mind is ...
(Sadly) my iPhone ...
Or I would have said that but since I got my car and passed my driving test I would actually say that I can't live without my car now.
It just makes things so easier ... instead of a 45 minute walk to work - it's now a 10 minute drive.
Instead of going to the shop 10 times a week, I can manage 1 or 2 times a week and I can do larger amounts of shopping.
It's just made my life so much easier ... so yeah ... I would go with my car!