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Q:

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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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.
(1) Answer
It is going into Limp Mode. It needs a full diagnostic from the dealership or another authorized Mercedes-Benz mechanic/shop.