[Vojno]

Thanks.  I can do that for sure. 

To increase my understanding, like on the cars, will the the mileage be written to the KOMBI if I code the KOMBI?  (Or run a software update in ISTA - which obviously would code the KOMBI once it has flashed it?)

Can the BMSE2 mileage and/or VIN be altered or does that have to be done on the bench with special equipment?

The mileage correction is not automaticly, but ISTA can also do it if the KOMBI are new!

The used BMSE2 can't change the VIN and reduce mileage, only with spec equipment in dump!

The mileage correction (just increase) is only possible because of this dash and bms does not save the new values at the same time. If the battery runs out during these then different values will be stored in the modules.
This correction option is meant to help, but it only allows you to increase the stored valu!