Call in advance and ask for the fleet manager and either make an appointment of at least get his or her name. Try to avoid the salesperson altogether. Tell only the Fleet manager what you want whether it is to test drive or buy or whatever. Examine the vehicle carefully. Examine the window sticker in comparison to your research information.
Test drive the vehicle.
Once you are satisfied with the car itself, negotiate price. Find out about any unadvertised incentives and low rate finance deals they may have for customers. Don't make an offer until they commit first to a 'best price'. Then you may counter-offer with a figure below your best price. Negotiate from there till you reach the maximum you have set for yourself.