I am new to this so if this is in the wrong place or if I am 'teaching my gradmother etc..' please feel free to remove.
We were told by our dealer, and this was re-inforced by everything I read, that you could NOT have a spare wheel or even a space saver on a Signature nav because the bose system sat in the place a spare wheel would go. We had our Kadjar out in Spain with us and needed to have the aircon re-gassed so took the car to our Spanish Renault dealer. While the car was in the repair section my husband got chatting to a guy in the sales section and talk got round to spare wheels, Thy man was amazed at what we had been told and said they allways offered a spare wheel as an optional extra. He actually showed him one in the showroom.
Result - just this morning he threw away the dreaded inflation kit and the polystrene stuff surrounding it and put a 17" full wheel and tyre in its place. The bose sits iinside the hollow of the wheel the screw anchors it all down.
A lack of technical knowledge on my part may have led to some incorrect terms.