hello the problem is my 1993 mercedes 190 2.6 is lossing power after driving mabe 20 min are so. yesterday on the freeway i notice it lossing power big time. when i exit the freeway it wont go past 60mph i had to floor it just to get it going and then it stall on me but started back up with a few tries. what can this be i was think mabe fuel related but im not sure thank you for the help im just trying to make it day by day.