I bought eclass convertible 250cdi 2014 from Mercedes. I never thought that if I buy Mercedec approved car I could be so disappointed. When I drive slow in high gear lets say 40-50mph, gearbox is in 5,6 gear and I accelerate (so when the engine got more vibration) there is loud rattling noise coming from under the car. Front passenger side. Its not something hardly nticeable but pretty loud. I went back twice to main dealer where I bought the car problem still there. i went to different city they didnt resolve the problem saying even if they find they will have to charge me. WTF got the car three weeks now. I am feeling like I bought Skoda or Dacia but even they would say it is not normal. Dont know what should I do? If thats how it looks to drive mercedes its my last one and not for too long.