help identifying a set of Mercedes branded roof rack cross bars
 

I need help identifying a set of Mercedes branded roof rack cross bars so I can order some replacement parts. The only numbers I can find on the pieces is under the strap latch mechanism.

DMW B61684 83 26. or that 26 may be a 24
AIS 12
0507.3071.003

Here are some picsAttachment 111713Attachment 111714Attachment 111715Attachment 111716

more picsAttachment 111717Attachment 111718Attachment 111719Attachment 111720Attachment 111721

DMW ( Might be a abbreviation / initials of the maker )

B61684 83 26. or that 26 may be a 24 ( should be the accessory number from Mercedes, dealer installed parts no longer use the standard format XXX.XXX.XX.XX )

0507.3071.003 ( is probably the makers model number )