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Hello and welcome to just answer my name is ***** ***** am I assisting please Sorry to hear you are having trouble with your vehicle but I am here to help. The system will automatically offer a phone call but I'm unable to take calls at this time. One moment while I review the information. Regards Ian
It could be that you have connected the battery up in the wrong order or it also could be that the aux battery is faulty as there is another snmaller aux battery.
The correct way is to disconnect the rear one, then the front one, when connecting again, connect the front one, then the rear one, do it wrong and the red message comes up.
It can also be the BNS (power supply control module) in the boot (upper right wheel arch) is faulty and isnt putting the correct messages on the BUS.