In Lemon Law Resources: Litigation Process, Attorney Sergei Lemberg writes regarding discovery:
Discovery is the longest part of a lemon car case: it begins soon after a lawsuit is filed and often does not stop until shortly before trial. During discovery, each side asks for information about the facts and issues of the case. Information is gathered formally through written questions (known as interrogatories), requests for documents, and requests for admission (which ask each side to admit or deny statements of fact).
Discovery includes questioning the dealer personnel, representatives of the manufacturer and/or any expert the manufacturer may have hired. Often, a claim or defense requires support from expert witnesses to explain technical information or validate an argument. One or more experts might be needed to testify about the connection between the manufacturer’s and the dealer’s conduct, the defects in the vehicle, and the loss suffered by the plaintiff or the existence and amount of the plaintiff’s damages. Expert witnesses work closely with representatives and attorneys to prepare the case. The plaintiff’s attorneys may retain and ASE Certified Master Mechanic to inspect the lemon vehicle and write a report.
For more, see LemonJustice.com