Engine goes off, runs round when it is warm, additionally high fuel consumption

Hello dear community I have a problem with my 230ce. My 230ce runs great when it’s cold, but when it’s warm the worst it’s in city traffic, he starts shaking and sawing himself at the traffic lights until he goes out. If he stays on it sounds as good as it goes (automatics) as if he has misigned. As soon as I’m back in the running traffic he runs well until the next stop. In addition, I come with a full tank only 350 km makes about 18 liters on 100 km. I don’t know so slowly any more since it runs until it’s warm so great without problems. Have already installed new ignition cables and a new distributor with finger but without improvement. I have already exchanged some underpressure hose connections. Hope you can help me