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2003 Mercedes-Benz E320 Question: car runs rough

 

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easyed, Alexandria, VA, October 31, 2009, 08:01
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I have a 2003 E320 which has started to run rough, sounds like a diesel, with moderate vibration. Just had the oil changed by MB dealer but no change in running condition. What should I check?

The dealer changed the oil "only".

I did not have a check engine warning.

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, October 31, 2009, 10:03
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     Master

    Did the dealer make any comment about the way the car ran? If the Check Engine Light is on a code is stored in the on board computer in your car. A scan tool is required that attaches to a 16 pin diagnostic socket under the dash of your car that reads problem captured by the on board computer. If a Check Engine Light is on I suspect an ignition problem or fuel injector problem but I more suspect your car has an exhaust leak from a gasket, cracked manifold or exhaust pipe/muffler.

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    easyed, October 31, 2009, 12:33
     Rookie

    have a 2003 E320 which has started to run rough, sounds like a diesel, with moderate vibration. Just had the oil changed by MB dealer but no change in running condition. What should I check?

    The dealer changed the oil "only".

    I did not have a check engine warning.

    Reply
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  • Answer #2

    Visitor, December 06, 2010, 08:46

    Have the engine mounts checked. Bad mounts will make the car seems like it has a rough idle, but is actually the vibration on the engine.

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