My 2007 E320 Bluetec came with a 50 mph/ 50 mile range compact spare. I asked MBUSA about putting a full size spare in the trunk. They said it would not fit. I went home and tried with one of the 4 real wheels and tires and it fit fine.
Since then I have purchased a full sized wheel and tire just like my other 4 and a real MB plastic " bucket" to hold it in the spare tire well just like on my 1993 E class.
This is something I would recommend for anyone who uses their car for out of town travel. On eof the 50/50 compact spares can ruin a business trip or vacation.
I acn't understand why MBUSA doesn't want us to have this sometimes critical feature on our wonderful cars.