Brought my friends 06 mb c230 into the shop cause the engine was ticking. They said 3 of the 4 camshaft magnets were bad and two camshaft plugs were leaking oil. They want $882 to repair which she can not afford at all. I've worked a lot on cars but am unfamiliar with this. I want to help her out and fix it myself but need some guidance.

Does anyone know how difficult it is to replace all the magnets and plugs? Is there a tutorial about it somewhere?

I found a camshaft magnet on here for like $30 something. Is it the same magnet for all 4 areas? Tools required? And possible time involved?

Thank you for any and all help I can get!