I changed my fuel pump today in my 99 ml430 to fix my fuel gauge. I bought the car about a month ago knowing it had this problem and ordered the pump. After changing the pump I went to the gas station to fill the tank and the guage is now working correctly !!!!! But I also noticed that take off from a stand still was tremendously better? It wasn't running bad before but there is now a huge difference in how well the car accelerates !!! occasionally I would feel a slight miss when accelerating at medium speed. This was going to be another proj. but it is now FIXED. I got a two for one deal..... I guess the old pump had low fuel pressure? The car only has 70k on it?