The issue is that: the dealership are not accepting to take responsilities for BMW AG design...
the dealerships will only take action if they are being ordered by the mother house and these actions would be compensated somehow for the time taken to recall all cars.
Imagine if one dealership "volunteer" to correct this rust problem, that dealership would suddenly have the burden to rectify all the cars coming for the seat rust, monopolizing its resources instead of making sales...
So until the dealership receive the words and orders from BMW AG, there isn't much you can do... unless someone else find a loop hole in all this.
But i am just saying: dont be expecting too much until you see a directive directly from BMW AG.