I have posted this problem before and I have gotten some really great advice. My 1989 300E has a problem shaking when I start it up. The rpms do not hold. I have to press the gas pedal to keep the car on high idel so the car does not shake and sometimes the car stalls. I have to start the car 2 - 3 times to get the car to stay on (this happens sometimes). After driving for a couple of minutes the car is great. When I get to where I am going I will turn the car off. I will get back to the car after 20 min and the car starts up great. When the car is sitting for a couple of hours the problem comes back. I should mention that there are some times that the car starts up great, this is usually when it is a bit warmer outside but not all the time.

This is a list of parts which I have changed in the last couple of months:

Distributor rotor
Distributor cap
Voltage protection relay
Water temp. sensor
Battery
Neutral saftey switch
Fuel filter
Both Fuel pumps

Please help!!!

Fab