Thanks mate. Car is a 2007 E70
I’ve read through this a few times.
I can’t find any descriptions anywhere on the other modes.

“ Transport mode
In the Transport mode, the nominal height is raised (e.g. 30 mm). Increasing the ground clearance ensures safe transport of the vehicle.

Production mode
The Production mode is used for assembly on the line and prevents regulating operations.

New EHC control unit are delivered with the Production mode set. After assembly of the new EHC control unit, the Production mode must be deleted.”