Let me give you a starting point. Why do you really drive the car that you currently have? Be honest with yourself. Look for some deeper thoughts and become more self aware. Then study family, friends and colleagues. Talk to them, look for inconsistencies. You're a sales person, you can read people. What is it about what the car does for them that lights up their face? Watch for the topics that leave them bored, or bring out the negative signs. This is a few simple paragraphs about people, not cars, and it could be the start of a whole new way of selling for you.