Ford Mondeo jerks when accelerating

[rmak]

Hi Guys,
I bought used 2010 Ford Mondeo MB Petrol a few weeks ago. Car has done 27000Kms and still under factory warranty. Since first day I started to experience strange problem. Whenever I push accelerator right after braking, car jerks forward once. I drive in auto mode (D). It usually happens at roundabouts or road bumps. And it happens only if time between braking and accelerating is short (probably less than 2 seconds). If I wait long enough before accelerating it goes smoothly. I am not a race driver; it happens if I press pedals gently. The critical point is time between stop and start. Example: I drive 50kmph, 30 meters before roundabout I push brake gently until complete stop or nearly complete stop, I remove my foot from brake and press accelerator gently – car starts to go and jerks forward once. After the jerk its back to smooth sailing again

Do you think there is something wrong with transmission? It gets really annoying because I need to think about it every time I approach roundabout.

Is it hard to deal with Ford when it comes to warranty repairs?
Can you recommend any good Ford dealerships in Melbourne?

Thanks!