Connected and Automated Mobility (CAM) services like Tele-operated Driving, High-Definition (HD) Mapping, and Anticipated Cooperative Collision Avoidance (ACCA) require uninterrupted network connectivity. This is a particular challenge in Europe where national borders can be passed without stopping while Mobile Network Operators (MNOs) usually only serve a single country. Today, vehicles keep the connection to the MNO of the country they come from until the signal is lost and then search and register with an MNO in the country they enter. This causes several minutes of service interruption, which is not acceptable for the aforementioned CAM services. Therefore, 5GCroCo, together with the other Horizon 2020 ICT-18 and ICT-53 projects, conducts research on cross-border/-MNO handovers to enable seamless service continuity when crossing borders. For this purpose a large-scale test and trial network was deployed in the Metz-Merzig-Luxembourg 5G Corridor. This paper presents results from that setup where the HD Mapping and ACCA use cases experienced hardly any service degradation when transitioning between the two networks.