I hope you know what you are doing, that is not an amatuer job and you can make costly mistakes. With that said I wish you good luck and here are some links for you to gain some insight on the procedure.
Make sure you buy a high quality gasket of the improved/upgraded design.
M104 Head Gasket Replacement - PeachParts Mercedes ShopForum
PeachPartsWiki: Head Gasket Replacement
Make sure you buy a high quality gasket of the improved/upgraded design.
M104 Head Gasket Replacement - PeachParts Mercedes ShopForum
PeachPartsWiki: Head Gasket Replacement