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i have an '07 mb c280. The check engine came on out of the blue today. the car is running perfectly fine. I have it maintained as required. The last time this happened it was caused by dirty filters. without a code, can you tell me what kinds of problems can cause the light to come on when the car is running fine?
in Aug 2012, the a/c stopped cooling. I took it in for service. they ran dye thru lines to check for Freon leak, finding none. they put more in and off i went. in may '13, same thing again. same service no leak, filled it up. Aug '13, same thing.