i was lead to believe they are meant to be xl/reinforced tyres fitted to these cars,
but that could be for mine as they are 18s.
best thing to do is to check on etis for the exact info,because if god forbid there is an insurance claim it will be thrown out.
this is for my missus smax 215/60 R16 99H Tyre
and for mine,
235/45 R18 98W Tyre
iirc the info should be on the lable on the door pillar .
The label on the door pillar only states dimensions (same table as the one in the manual) - simply states 225/50 R17 and the tyre pressure.
Managed to find my car on etis, but couldn't find anything there about tyres...