Gtech gave you the procedure to reset after unplugging EPAS, I would try to NOT connect the epas again after reset. My EPAS had water ingress and failed, had to replace 2014 MS, not saying that is it, but you seemed keen to reconnect it, I would try at least once without,
On FB BMS_u029/BMS_u018 you may get more support from knowledgeable contributors.