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Q: Loss of power and check engine lt on on 2005 Mercedes-Benz S600

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Fault code said left ignition coil was bad so I replaced that along with the spark plugs and the car is the same. When I pull car out of garage in morning it usually runs ok but driving to work it starts acting up and loses power.
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It is going into Limp Mode. It needs a full diagnostic from the dealership or another authorized Mercedes-Benz mechanic/shop.
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