Fix Mercedes-Benz ML 320 Abnormal Start and Acceleration

Here`s the two most possible reasons :

1. Clogged fuel filter/ fuel injector
Its a problem with your fuel management system. your fuel injectors maybe bad/clogged. the fuel filter may need to be replaced.have your fuel filter changed.I would have the fuel system serviced injectors actually removed and cleaned

2. Bad spark plugs and wires
Check for worn plugs and wires

If spark plugs look like a problem , a good tune up and service will be good.
In worst cases, a bad ignition coil could be the culprit too. So check these things

What's more.Your problem is a misfire. You need to do a misfire diagnosis and then correct the cause of the misfire. If you have allowed the misfire to continue for too long, engine damage may have occurred, but otherwise correcting the cause of the misfire should set everything right.
Those are my opinions, hope I can help.