Help please, I have a 1995 C280 and 2 of the bolts securing the valve cover are stripped. They hold a bit but it looks like they are damaged down in there and do not give a unifide hold to the valve cover thus I have some oil seepage on one side.

I want to fix this issue with a Helicoil kit but do not know what to order, can anyone help me out with this...

Thx,
Bill