I have a 1991 190E 1.8 and I´m having problems to start the car. In the mornings when the car is cold doesn't have to many problems, but I have to help it pumping the accelerator. When the car is hot never star in the first try but it does consistently in the third, pressing the gas to the floor. I also have notice sometimes a strong smell of gasoline inside the cabin that I guess can be related to the problem.