Vehicle keeps cutting off. Starts back up minutes later.. on 2001 Mercedes-Benz ML430

When mechanic went to install crank sensor, he found teeth missing on the flywheel. Would this be my problem? Other mechanics are saying that it sounds like a fuel pump, not the fly wheel.

Asked by for the 2001 Mercedes-Benz ML430
yes it could be an issue that will cause misfires or stumbles. repair that 1st and ck fuel pressure