0F030B Mercedes Fault Code :
Read the description of 0F030B in TCM01B and the engine lights up for TCM01B - TCMV Transmission Control Module Voith code, there are some possible causes for it.
CAN - Protokoll VOITH private CAN Timeout der CAN-Empfangsbotschaft PDO_MC_0x21C (Temperaturen der el. Komponenten des Mototcontrollers).