Douglas, a Businessman, Rented a Car from Lemon's Auto Rental

Douglas, a businessman, rented a car from Lemon's Auto Rental. He intended to use the car to distribute products from his business to those of his customers. In the course of his commuting around the city, Douglas encountered many streets laden with "potholes." Just before returning the car to the rental lot the car suffered a breakdown resulting from problems with the suspension system. Three weeks later Douglas received a bill for the repair of the car he had rented. Douglas appealed his bill to the company stating that they should be responsible for the repair. The company replied that the rental agreement stated that the lessee is responsible for problems created by normal "wear and tear."
Discuss the relevant issues of bailment in light of this situation.