I updated my maps in my 2011 car last year from the original 2011 maps. I did it via the glovebox USB port. Went for an hours drive and it rebooted and was ok. Had to enter the code right at the beginning of the process.
I have a tiny thumb drive in the armrest port for music, works a treat and as it’s so small there is no chance of it getting knocked. 64GB I think.
On the nav screen there is a little round icon in the bottom left. If this has a tick in it, the glovebox usb update method should work, no tick means it has to be done by dvd, but I thought that was a 2010 change so your 2012 car should have it.
Tried to add my car to connected drive iPhone app and it said to go to dealer. Message came back the car is too old and no longer supported.
Does this £60 subscription for 2 years maps work on older cars?