I may or may not do the same myself to my 603. I have been told on this forum that to change the head gasket, you must first remove the cam. This is where it gets tricky! There is a special sequence to remove the cam and if it is not followed to the letter, according to MB, you will bend or snap the cam!

While this is not impossible to do if you can get the info, and follow procedure, it just might be worth it having a MB specialist do it!

Wonder what they charge?