The sunroof grease list is $145.00 for 1.1lb. or 500grams. Park Place MB in Dallas sells to MB club members for $80.00. That amount will last a lifetime for the average DIYer. I haven't found any grease as high a quality as this and use it on all my window riser repairs as well as any other slow movement items such as headrest gear assemblies. Doesn't take much but I wouldn't be without it.
Tim