[plob]

To summarise - here is how the 3 scenarios mentioned above can be handled:-

1) If the auto box is in gear (or park) and there is no power, it can be put in neutral using a lever and set screw under the gearbox - as mentioned by 02420X3

2) If the auto box is in gear (or park) and there is power, the gearbox can be put in neutral using the gear lever procedure mentioned by DEVM. Please note that this function only allows the vehicle to be maneuvered - NOT towed. The system then starts a 15 minute timer and will put the gearbox back into park once that timer expires. If the wheels start to move during the 15 minute period, the timer is reset.
I understand that the vehicle is capable of telling if it is being towed (probably by its inclination whilst wheel motion is detected). Given that the vehicle should not be towed (i.e must be transported on a flat bad), breaking these 'rules' will be classed as 'misuse' by the vehicle electrical system. In the event of misuse, an entry is stored in the fault memory.
So, like it or not, the car must only be transported on a flat bed truck. Although you can put the car in neutral and tow it, this will be classed as misuse and stored as a fault in memory. Indeed, the owner's manual clearly states that the vehicle must only be transported on a flat bed - towing it may result in damage.

3) An electromechanical parking brake (EMF) actuator is located in each of the rear brake calipers. The actuator is made up of an electric motor that drives a belt; that drives planetary gear train that pushes a spindle into the brake caliper to activate the brake function. Emergency release of the EMF parking brake by the customer is not provided for. However, it can be released by a service engineer by unscrewing the actuator and manually screwing back the EMF brake spindle.

So, there is emergency provision for each of the above scenarios. Whether or not the roadside recovery crew or service engineer know how to do this (or are willing to) is another matter. I guess the most important thing to note is that towing the vehicle will result in damage and 'misuse' being logged in the fault memory. Like it or not, the car must only be transported on a flat bed as per the owner's manual.

Hope that helps