Hi, I'm new to the chat, bought a 2018 MP a few months ago and have spent quite a lot of time fixing some issues myself and resorted to a garage for the more difficult ones! I thought I was out of the woods and now the Aux Battery Malfunction warning comes up most days. It also prevents the cruise control from working. From what I understand the Aux battery is a the small motorbike battery under the drivers seat and accessed from behind the seat. It looks difficult to get out but I managed to get a volt meter across the terminals while in situ and its reading 12.8V with the engine off. Has anyone else had this problem and if so what was the solution? There does appear to be a small component fixed to the side of the battery box which is connected to + side of the battery (see photo). Maybe this is a voltage regulator. The output from this was 12.4V.
