If you need a parts listing, the MB ECP is the site to have
Parts can be located by Vin#
http://mbepc.net/en/1
As for a WIS, not needed that and the one I did find was a huge download.
Yes I was using that until someone posted a better website. The downside being it is a Russian site. However it lets you scroll while keeping the diagrams beside and the parts are hyper linked to the diagrams and vice versa.
I am still evaluating this Russian site.
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Are the 4 you have to replace the locking wheel bolts with? I had a set of 4 (with the locking bolt adapter) and a separate blow moulded case with the 5 for the spare.Thanks for the EPC link AMG, just been able to confirm that the spare wheel bolts for my R171 SLK280 are A203 580 0010 M12 x 1.5 x 21 so can buy a set off eBay (my car only came with 4 instead of 5, and not in the little storage thing) even though they're listed for a 203 C class!