I use only 1 brand when I do the head gasket jobs on 104 engines. The name is Goetze. I am not sure of the spelling, but it is close.
The gasket they produce is a brown color and the coolant sealant is black. The other one is Elring. it is black with red sealant. I have seen these fail twice on the same engine, after replacing with the Goetze brand, no failures.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS