I'm not so sure.
I did try that in 2008 and things may have changed since but you still collect from Sindelfingen where you will get free tickets to the MB museum in Stuttgart (which is a must!!) however if you call up the guys at Affalterbach and let them know your collection date they will also arrange a very nice tour of the facilities, when I went they even put out the union flags to show their appreciation when I questioned the flags they said it was just for me as every AMG buyer/owner is special...
and they made me feel just that.
.