Car has been running fine and just a few hours ago it had the lowest roughest idle when I crank it up. I adjusted the fuel mixture on it (richer) which smoothed it out a bit, but when I gave it gas I got no response, if any it was a stalling type hesitation. problem appears to be fuel related, but now my battery is dead from adjusting the fuel and cranking it so much. Why does this happen the night before I have to go to work?!?!

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1990 190E 3.0L