I am having problems with my 2012 C250 once the car gets up to operating temp. Once there the car is running really rich and stutters and misses, barely idling. Cranking up cold it fires right up and runs smooth, but once it hits 80c it starts to act up. Strong gas smell from exhaust. Changed plugs and coils. The plugs were burnt charcoal black (and dry). This did not fix the problems, and the following codes are showing up. 0597, 0128, 0302, 0068, 0106. I know that I need to change the thermostat / housing, will that take care of 0597 0128 codes? Are any of the others related to the thermostat? Are any of the other codes showing as a result of the thermostat?