Difficulty starting and flickering lights on 2017 Benz GLA, petrol engine, 92541 km

Fault code B210A typically relates to a communication issue within the vehicle's network, often involving the CAN bus system. This can be caused by a faulty module, wiring issues, or a problem with the network itself. I recommend checking the wiring and connections related to the modules in your vehicle. If the issue persists, it's advisable to have a professional mechanic diagnose and address the problem to ensure safe and proper operation. Let us know how it goes or if you have any further questions.