hopefully someone out there can help me with this. my 190E has started to stall frequently when i am slowly braking towards a light or a stop sign. it immediately turns over again. it has a hrad acceleration on occasion. if i'm in stop and start traffic, the idle speeds up and slows very erratically; sometimes when it's idling in park, it justs stops running. otherwise the car runs great. the other thing is: this stuff only happens in warm weather...