Mercedes Benz 300e Engine Hesitate

While Driving From 0 To 20 Hesitates On Excelliration Then It Kicks In And Then Does It When It Gets To About 45 I Hadn't Drove It In The...

Thank You For Answering My Question. Just Bought This Car. Previous Owner Said, I Believe Him, He Installed A New Fuel Distrubuter, And 2 '...