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Try to find your Owner's Manual on http://www.mbusa.com/mercedes/#/servPrtsOwnersManuals/
The airfilter is on top of the battery. Lift the battery cover off and the filter sits on top. Simples!
is on the left side of dash area,their is a plastic cover that it has to me removed it snaps in and out,shoud be a 30amp fuse. Or in the boot on the left hand side, 2001 c200K