6th – Question on climate and board computers

Good day to each other, I have two little questions about the 6th 2003. 1) The board computer. I recently went about 220km on the highway. I put the counter at 0. To save a bit of fuel, I drove about 130km/h. Before Munich was then tough-flowing traffic. After Munich I was then heated to get the time back in again. The computer indicated an average speed of 63km/h. However, that can not be true at all, since After Adam Riese this results in a little less than 100km/h. Also the average consumption with 8 liters can not be right at all. At the end I sucked through at least 10-12 liters, before it was also about 9 liters / 100km. 2) I have “problems” with light engine rucksacks and “acceleration holes”. It feels as if the engine had a sudden 5 hp less. Yesterday evening much to me that also the dipped light gets darker. Can it be that the Damic air conditioning machine on the “car” setting constantly shuts the compressor down and shuts it down again? That can’t be at 10°C outside temperature anymore, can it? Thank you, beautiful Sunday, AllDayPiano