Method for generating data for benchmarking mobile radio networks (101; 201) by using loading operations for making performance recordings on several mobile radio networks (101; 201), the method comprising the steps: - providing each TCU of a group of vehicles with a benchmark service including a SIM management to enable roaming to networks and an OTA service, wherein the benchmark service and the OTA service are running on the TCU of each vehicle of the group of vehicles and communication between each TCU and a OTA server is established via at least one of the several mobile radio networks (101; 201), - identifying a data transmission campaign (e.g. software update) for a benchmarking process by the OTA server, - running a data acquisition process for a selected number of vehicles at individual times, wherein the following steps are executed between the TCU of each vehicle and the OTA server: - an availability of the loading operation is indicated by the OTA server to the OTA services of the TCUs to inform about a new software update to the OTA server; - the benchmark service is triggered by the OTA service for preparation of measurement; - the use of a specific mobile radio network (101; 201) of the group of available mobile radio networks (101; 201) is negotiated for the loading operation between the benchmark service and the OTA server; - performance recording of measurements by the OTA service is started and performance recording of measurements on the OTA server is started; - start of the loading operation is requested by the OTA service; - the loading operation between the OTA server and the OTA service is executed; - the performance recording of measurements by the OTA service is finished and the performance recording of measurements on the OTA server is finished; - performance data of the performance recording of measurements of the OTA service is uploaded to the OTA server via one of the mobile radio networks (101; 201), - the performance data of the OTA service and the performance data of the OTA server are stored in a database for benchmarking, wherein the use of a specific mobile radio network (101; 201) of the group of the available mobile radio networks (101; 201) is negotiated for the loading operation between the benchmark service and the OTA server by the steps: - initial measurements are performed by the benchmark service on all mobile radio networks (101; 201) available in the vicinity of the vehicle; - data of the initial measurements is uploaded to the OTA server, - a selection of a certain mobile radio network (101; 201) of the group of the available mobile radio networks (101; 201) is done by the OTA server on the basis of the data of the initial measurements. - providing each TCU of a group of vehicles with a benchmark service including a SIM management to enable roaming to networks and an OTA service, wherein the benchmark service and the OTA service are running on the TCU of each vehicle of the group of vehicles and communication between each TCU and a OTA server is established via at least one of the several mobile radio networks (101; 201), - identifying a data transmission campaign (e.g. software update) for a benchmarking process by the OTA server, - running a data acquisition process for a selected number of vehicles at individual times, wherein the following steps are executed between the TCU of each vehicle and the OTA server: - an availability of the loading operation is indicated by the OTA server to the OTA services of the TCUs to inform about a new software update to the OTA server; - the benchmark service is triggered by the OTA service for preparation of measurement; - the use of a specific mobile radio network (101; 201) of the group of available mobile radio networks (101; 201) is negotiated for the loading operation between the benchmark service and the OTA server; - performance recording of measurements by the OTA service is started and performance recording of measurements on the OTA server is started; - start of the loading operation is requested by the OTA service; - the loading operation between the OTA server and the OTA service is executed; - the performance recording of measurements by the OTA service is finished and the performance recording of measurements on the OTA server is finished; - performance data of the performance recording of measurements of the OTA service is uploaded to the OTA server via one of the mobile radio networks (101; 201), - the performance data of the OTA service and the performance data of the OTA server are stored in a database for benchmarking, wherein the use of a specific mobile radio network (101; 201) of the group of the available mobile radio networks (101; 201) is negotiated for the loading operation between the benchmark service and the OTA server by the steps: - initial measurements are performed by the benchmark service on all mobile radio networks (101; 201) available in the vicinity of the vehicle; - data of the initial measurements is uploaded to the OTA server, - a selection of a certain mobile radio network (101; 201) of the group of the available mobile radio networks (101; 201) is done by the OTA server on the basis of the data of the initial measurements. - initial measurements are performed by the benchmark service on all mobile radio networks (101; 201) available in the vicinity of the vehicle; - data of the initial measurements is uploaded to the OTA server, - a selection of a certain mobile radio network (101; 201) of the group of the available mobile radio networks (101; 201) is done by the OTA server on the basis of the data of the initial measurements.