I Just don't want to have a car that does not come with a full sized spare . I have a nightmare of being caught somewhere that has no idea what a 225/45/ZR17 looks like never mind stock one .
If i had a nice 15" spare wheel i could limp home. Mercedes are up to this just now with the C class coupe , and now the E class and also the ML has a silly little wheel on it too.
I would never buy a car without a full size wheel .