Use EdrawMax to create the car shop ER diagram. Entity Relationship diagram for a Car Shop is a visual presentation of a car shop's entities and relationships that include information about mechanics, repair jobs, details of the car, ISA information, and details of the client (both buyer and seller). The ER diagram of the car shop shows that the vehicle should have information like manufacturer, model, year, and license details. In addition to this, Repair_job has a description, number, cost of parts, and work cost. As the below diagram suggests, the ER diagram represents the model of the car shop system and the relations between car models, inventory, cars, booking, and other relevant information.