I have a 1988 300SEL w126.

My problem started a few hours ago today. When I stop at a stop sign and then accelerate, the Economy level indicater would start to sway and then move all the way to the right in the red area. Then the car starts to shake and jerk. I turned it off, then restarted.. the car went a little and then started doing it again. I stopped quickly at a gas station and added more premium gas since it was a bit low. Then I took it on the highway and it went smooth. 15 minutes in when I slowed down a little I felt a jerk. The engine tempreture was at about 80-85, the oil indicator thing pointed between 1 and 2. The RPM indicator thing did not have any radical movements and functioned normally.

Please help me find out whats wrong before I contact a technician.

Thank you,
Sharif