If you prefer to set your cam timing to a specific crank angle MB does offer offset woodruff keys too reposition the camshafts. When you use these keys you need keep in mind that the alignment mark(s) on the cam thrust washer may not line up with the mark on the cam bearing. The offset keys will advance or retard the camshaft without effecting the position of the alignment marks. To set the camshafts to an exact crank angle requires the use of a dial indicator and the appropriate vices with the base to support it. Should you choose to set your camshaft timing in this manner be prepared to spend a little time getting it exactly it where you want it. This can be a rather involved process for something you may not even recognize when completed.

When it is all said and done you may notice an improvement with your idle quality but personally, you may want to reconsider how close your alignment marks really need to be.