Not sure just what the composite body consists of but probably kevlar,
carbon fibers and maybe some fibreglass. In any event you can repair almost
any composite but it sure is a heck of a job. You have a problem when you
get through whatever resin is used (probably a high-tech epoxy) and hit
kevlar with a sanding wheel. It instantly turns into a ball of fuzz. All you
can do is cut it off with a razor blade, apply more resin and try to avoid
going all the way through the resin when you return to sanding. In my
opinion the thing that would require the greatest amount of time would be
matching the paint. That thing really did shine and was as smooth as any
finish I've ever seen on anything except metal.!

My point is that it can be repaired without replacing the entire body,  
not that MBZ will do it that way.

It is clearly a specialty job and not for the faint of heart,  but
composite materials like fiberglass and carbon fiber most certainly are
repairable...

It does take a very skilled person to make it look right however...

Marty