Swedish for beginners and problems on the highway

Hello dear people, since yesterday have a V70 of 9/2006 136 KW. , 90tkm and 1 year used car warranty. The car is an import from Sweden and thus the instruction in Swedish and all messages of the onboard computer. Now the following problems arise: Lt documents was the last maintenance before 1500 km, nevertheless it shows in connection with a yellow triangle a message, which sounds to me very much motor and maintenance (“motorsystem serv. erfordras”. Another error message kö In addition, I would like to know what else it says. 1. Can you change all this in German or English? 2. Where do I get a German manual? 3. I drove the first longer route today. On the highway at 190 km/h (t Tacho and a little over 3000 rpm) he had a kind of push-off. That means he accelerates relatively normal up to about 190, then nothing works anymore (feels like a kind of brake parachute) , it goes then down to about 160 and after a few seconds you can accelerate again and the game starts again from the front. I’m curious about your answers Thank you