If a Mercedes with code 487 that means equipped the ABC (Active Body Control) system. A hydraulic struts. That can deliver a 'magic carpet ride'. Here are the guides of WIS for how to remove-install spring control arm on the front axle with code 487Remove-install spring control arm on front axle with code 487.pdfDownload PDF • 588KBNotes on Active Body Control suspension.pdfDownload PDF • 409KB