I spent over 3k the mechanics at merc changed the fuel senders then the tank, it was doing the same in my car it would run then stop about ten kms later I finally worked out the problem myself because the driveshaft goes through the lower half of the tank it has venturi pumps inside the tank which suck gas out of the two sides and pump it into a smaller holding tank (the smaller holding tank is built into the inside of the maintank ) this tank is where the fuel pump collects the gas, the fuel pump then pumps it to the motor then back down to the fuel tank were it pumps gas through the mechanical venturi pumps collecting more gas and dumping it in the holding tank,
merc mechanics will put a pressure tester on the fuel valve and tell you that the pressure is fine, but the problem is not the pressure it is the FLOW - there are only two ways to get fuel into the holding tank 1 ) by being pumped in with a correctly working fuel pump or
2) when you put gas in the car it goes into the holding tank and then overflows out to the main tank
Hope this helps (I was getting to the point of dam near burning the car in mercedes benz drive way. HAha)
Wednesday, November 7th, 2007 AT 9:04 PM