Method for identifying, diagnosing, servicing and repairing a vehicle in a workshop, having the steps of: storage of customer, vehicle and workshop order data for the vehicle from a central customer database in an operating data memory device of a mobile communication interface; connection of the mobile communication interface to the vehicle and connection of a first vehicle tester at least to the mobile communication interface on a first workstation; reading of the customer, vehicle and workshop order data from the operating data memory device of the mobile communication interface into the control computer of the first vehicle tester; performance of first tests on the vehicle using the first vehicle tester and/or the mobile communication interface; storage of first test results in the operating data memory device of the mobile communication interface by the first vehicle tester; disconnection of the first vehicle tester from the vehicle; connection of a second vehicle tester to the vehicle and reading of the customer, vehicle and workshop order data and of the first test results from the operating data memory device of the mobile communication interface into the second vehicle tester on a second workstation; performance of second tests on the vehicle using the second vehicle tester and/or the mobile communication interface connected to the vehicle on the basis of the first test results; storage of second test results in the operating data memory device of the mobile communication interface by the second vehicle tester; and reading of the customer, vehicle and workshop order data and the first and second test results of the vehicle from the operating data memory device of the mobile communication interface into the central customer database. storage of customer, vehicle and workshop order data for the vehicle from a central customer database in an operating data memory device of a mobile communication interface; connection of the mobile communication interface to the vehicle and connection of a first vehicle tester at least to the mobile communication interface on a first workstation; reading of the customer, vehicle and workshop order data from the operating data memory device of the mobile communication interface into the control computer of the first vehicle tester; performance of first tests on the vehicle using the first vehicle tester and/or the mobile communication interface; storage of first test results in the operating data memory device of the mobile communication interface by the first vehicle tester; disconnection of the first vehicle tester from the vehicle; connection of a second vehicle tester to the vehicle and reading of the customer, vehicle and workshop order data and of the first test results from the operating data memory device of the mobile communication interface into the second vehicle tester on a second workstation; performance of second tests on the vehicle using the second vehicle tester and/or the mobile communication interface connected to the vehicle on the basis of the first test results; storage of second test results in the operating data memory device of the mobile communication interface by the second vehicle tester; and reading of the customer, vehicle and workshop order data and the first and second test results of the vehicle from the operating data memory device of the mobile communication interface into the central customer database.