with my audi 80 avant with abt engine something strange happened earlier: on the highway at about 120 he suddenly became slower and slower, then the lights for temperature and oil level went on. temperature display was normal at 95o. I stopped, waited something and checked the oil level. which was ok. dripped or tormented also nothing. so I went on for the first time, without giving again real gas. has someone ne idea what that can be? I am grateful for every hint!