Rather than worrying about worn parts (provided the gear teeth are not severely hook shaped), suggest that you simply correct the cam timing.

Step one: verify the accuracy of the TDC mark on the dampner; i.e., check TDC of #1 piston vs. the mark.

Step two: use offset cam-to-gear keys to advance the cams by the amount of error which you observed as described above. The keys are supplied by MB for this purpose.

Advancing the cam timing by about 5 degrees vis-a-vis stock will provide a noticeable lower RPM torque boost.