Mercedes-Benz ML430

I bought a 2004 Mercedes ML 4 30 they put a new fuel pump in it and it still does the problem it kind of Puddles when you're driving it like it's not taking no gas the or is it the gas filter if ...

Batle To Start

2 weeks ago my car battle to start I change the air oil filters oil and spark plugs after that its not start first time and flood smell petrol