[c-hri-s]

On a 200 mile journey last week I stopped at a rest area and when I got back into the car the whole iDrive system was blank. No sound, no radio, no screen, no HUD, no parking sensors, no parking cameras.

Tried pressing all the buttons, tried holding down the power button for one minute (supposed to reset the system), tried turning the car on/off. Nothing.

Drove to my destination with it like this, came back to the car after 10ish hours and all was working again.

Does anyone have any ideas of what could have been wrong ... or has anyone experienced similar?

It's at the dealers today, but as it's all working perfectly again I'm suspecting they won't find much wrong. One of these things I really want to get addressed in the warranty period, as it smells very expensive to fix otherwise.