260E 1987 lost acceleration after speeding 120mph
I tried to run my 260E at 120mph. After 1-2 min driving I lost response from an acceleration pedal. When I pushed the pedal the vehicle started to slow down. When I released the pedal the car kept running without slowing down. So, an acceleration pedal worked like a brakes but very soft braking. The temperature and oil pressure were fine. I stopped and waited for 5-10 min. It was smoke inside the car coming from the area of the speed switch. It was almost no smoke under the hood – some from some device connected to the bottom of the cooling liquid container. When I started the car again and pushed acceleration pedal the car started jumping – speed up 10-20 mph and slow down losing response from an acceleration pedal and catching speed again and losing again.
Any ideas what happened?