To dream of a car dealership represents your open-minded attempt to take a new direction in life. Considering a whole new way of decision-making style. Dreaming of being at a car dealership may be a sign that you are considering a new job.
Example: A person dreamed of being at a car dealership looking for a new car amongst the various different choices of cars. In waking life they were very stressed at work and were considering making a change in their career.