Good Morning all!

I started the procedure to replace the valve stem seals on my 1978 240D yesterday and need a bit more guidance regarding cam vs. piston positioning. I have removed the rocker tower assemblies already, and before I start removing valve retainers and springs, I want to ensure that the pistons will hold up the valves as I remove them from each cylinder.

I was trying to verify where TDC for cyl.#1 is on the crankshaft dampener and was confused about the degree markings vs. the scribe mark that is on the dampener. Should I disregard these markings totally and just go by the camshaft lobes?

Thanks to whoever may have any input.