I have a similar question. Having had a Mondeo until yesterday when I traded it in for a 66 plate Kuga I know the USB used to drain the battery if left plugged in AND USB/Aux was selected as the input. Is this the same on the Kuga? Also, are the 12v outlets supposed to turn off a short time after the car is stopped/locked? Mine appear to stay powered up but I may not have left it long enough before checking.
Hopefully it won't take 2 years to hear back from somebody