mercedes/e-class/1996-2003

ETS WARNING

I have 1997 W210 E 320 some times the is turn off by it self and ETS warning raise in the small screen after this i raise fuel pedal i make pressure on 1 with ac and it's go fine after few days i get throttle out and clean it and put it back again but after cleaning it's be worest ENGINE pressure is go up and down some times be fine some time ENGINE doesnt work fast some times ENGINE start and off dirctly and ETS warning shows i dont know whats is the problems exactly .. I wish you can help me

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