W211 / W212 space saver compatibility

[jtr]

I have acquired a W212 with 225/50R17 alloys and no spare wheel (the AdBlue tank occupies the space saver recess). I'm thinking abou getting a space saver and have been offered a W211 unit which has the part number 2194000002.

Any help with the compatibility of the w211 / W212 space saver and whether the standard allow bolts can be used with it would be appreciated.

Thanks.