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93 MBZ 2.8 SERIOUS ENGINE VIBRATION WHEN START ENGINE, WENT AWAY 20 SECONDS LATER

1993 Mercedes Benz 300e • 6 cylinder 2WD Automatic • 140 miles

I have '93 MBZ 300E 2.8 with 140K miles on it. The problem is if I start the engine and drive less than few minutes like to driveway wash the car then back to garage and let it sit in there for a while or over night. Sometime it will develop serious vibration when start the engine but vibration will went away about 20-30 seconds later. Last week the same problem happen again but this time engine stopped and can not start again. The engine was able to start next day when I try to press the gas paddle to give more gas to engine. Engine was started but exhaust smell very bad. What is the possible problems?
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DavidWDunn
May 21, 2011.




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