BMW E-Series Bosch (can)

[europarts]

Hi i selected -stock
can someone explain 

PURPOSE of 3 modes and exactly when to select this
- stock
- tune
- repair

Under stock mode i do SAVE and also VIRTUAL READ.
The unit provides a slightly different file.

I only tune by modification of irom (full dump) on this vehicle and not by OBD before.

Thanks

[Bruce Willis]

Stock to write only stock

Tune to write tune with patch 

Repair to repair, if something going wrong