Sometimes you need a specific Mercedes tool, that's not in the standard tools set.... These are the most common ones.
14mm Valve Aligning Set & Feeler Gauges (you really need this)
Impact Puller (you need this for rebuilding your head, or taking it off)
Timing Chain Crimper
Valve Stem Installer
Most of the time you can get around it.
Here is a good link to check out
go to our TOOL RENTAL PROGRAM
here they also have such a program, though not in wiki format: