Quote:
Originally Posted by ifr
It still has a battery , 2 actually. Those are the batteries that the RSU checks to ensure it can maintain charge during the upgrade process and avoid bricking any of your ECU's.
This is the error that BMW would see if RSU was completely disabled due to a battery issue, not specific to charge level but condition. In your case it could be charge level so either take it for a long run, or stick on a charger as James suggested.
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ahh - okay that makes sense. The car has hardly been driven in the last 4 months and therefore likely that the battery is low. Don't have a charger and therefore will have to wait for a longer run before I try again