Scenic 2 coupler venting or drifting ?

Good evening dear friends. We have a Renault Scenic 2 1.6 – 16 V with the year 2003. the current KM is 202.317. since 4 days he is not our friend. First the battery was at the end. Now the problem is that he drives only when I play the beginner. So at 4000 revolutions and more, what goes. The fuel consumption has increased to Bitcoin level. The clutch is very soft. I tested whether the car runs out in the highest gear – No. In gear 3 it starts to itself move. If I want to drive backwards, it moves already at the least turn. The driving behavior is now very Shakira level. An error of the hand brake is shown very rarely. Thanks in advance to everyone for a forecast. Nice Saturday evening. Greeting from Bottrop David