Finally we have an 8 board in bimmer

it just happened few days ago, I can't really ideantify what's going wrong, but I sometimes go over 200Km/h and I feel no more accelaration until I remove my foot off the accelarator then step again then it cont. to accelarate. any idea what's wrong? last week my car just gave an EML light and lost lots of power, I switched it off then on again and everything was back to normal.

Thanks for the help.