There is a video on https: //youtu.be/U6BrsM3ilj8 that covers the procedure.
It's for an earlier year than yours, but the only difference I know of is that on 1999 to 2002 there is only a lock down position on the right side, and there is no handy inspection cover to remove, just the opening that the trunk hinge sticks through.
I don't have enough posts yet to post links, so just cut and paste the link above, removing the space between https: and // and it should work for you
Hope this helps!
Peter
A forum community dedicated to Mercedes-Benz owners and enthusiasts. Come join the discussion about performance, classifieds, troubleshooting, maintenance, and more for all Mercedes-Benz and AMG models!