Spare wheel advice

[REDCAPPER]

Can anyone please tell me is the 17 inch skinny spare that I bought for my c200 will fit onto a GLA with 18 inch wheels as an emergency spare.
Ideally it will fit and save me getting another one.

 

[OneForTheRoad]

Check the tyre size against what's fitted to the gla , for the rolling data .

Use a tyre comparison website like this