I want to thank everyone for input and info. I had my mixture adjusted with duty cycle meter and taped idle air vale hose with duct tape until I receive new hoses. I have O2 sensor checked. It gave me good readings. i also checked my fuel correction system checked. It also work good. Spark is good and strong. I cleaned rotor and distributor cap. With mixture adjusted and distributor cleaned car accelerates better. Thanks to forum members for info. I also found out that my EGR valve membrane doesnt hold vacuum. By the way can I drive without EGR valve operating? I will try to disconnected my cat this sunday if Ill have time. As some people would think that Im pushing the car a lot and expecting 300E to be rice rocket thus Im getting 13mpg. I can reply that I dont do those kind of things. I dont want car to peel off every intersection. The only think that I want more acceleration is because I almost got rear ended entering highway ramp. I dont floor cars so I didnt do it this time but I think I should do it entering highways. I pressed on gas pedal about 3/4 but car was really slow and I almost got into accident. Since I dont have 2 300Es to drive I cannot compare my car good running car. I was right about 13mpg being way low I remember my 420sel had about 12mpg and that was bigger displacement and heavier. Ill try do fix as much as I can and now I know to expect around 20mpg. Thanks again. Ill post updates with progress. Maybe this thread will help other members

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1999 ML430 Silver 135k ml
Smoked LED taillights, Alpine in-dash DVD player, 12" sub, Pioneer components, 2 amps, 4200k HIDs, ML55 headlights, 20" rims, mirror LED blinkers

SOLD. 1996 E320 145k ml. Burgundy

SOLD but miss it everyday 1992 500sel Black
Chime buzzer mod,Alpine CD/MP3 player with stock amp,Euro headlights,S600 grill,20" rims, BEST CAR EVER!

SOLD. 1990 300E White
187k ml,smoked tails,Euro headlights,17rims,Intake,12" sub in first aid kit,alarm/autostart,buzzer mod