Hello I have a 2005 Mercedes c240 4matic wagon. When driving the car everything feels normal but occasionally after driving it 1/2 mile or so it feels like the engine has a tremor. The tremor continues even after I pull over and it is idling in park. If I turn the car off and back on it will go away but will come back after driving a ways. When the tremor is happening it feels like it has less power than normal. Any ideas?
Get it scanned for codes, if any.