TheFunction of the fuel pump is to supply fuel at a certain pressure to the engine fuel injection system.However,the fuel pump have a limited life.If you notice any of the following signs with your car:(1).Engine Sputteringat High Speeds(2).Decreased Fuel Pressure(3).Losing Power when the Vehicle is under Stress(4).Inability to Not StartingThis may indicate that you need to replace the fuel pumpFuel Pump Replacement Guideline:Please Notethe following before replacing the fuel pump:1.Ensure that you are in a wellventilated and level work area. For 2007-2010 CL550 SLK55 Amg 2007-2008 Mercedes-Benz S550 V8 5.5L Fuel Pump
TheFunction of the fuel pump is to supply fuel at a certain pressure to the engine fuel injection system.
However,the fuel pump have a limited life.If you notice any of the following signs with your car:
(1).Engine Sputteringat High Speeds
(2).Decreased Fuel Pressure
(3).Losing Power when the Vehicle is under Stress
(4).Inability to Not Starting
This may indicate that you need to replace the fuel pump
Fuel Pump Replacement Guideline:
Please Notethe following before replacing the fuel pump:
1.Ensure that you are in a wellventilated and level work area.
2.Use approved safety glasses or goggles when working on any motor vehicle.
3.The gasoline is sucked out of the tank and stored in a container dedicated to the ground (negative) cable of the battery and ensure that it does not accidentally spark while working.
Picture(B)
Locate and removegas tank filler neck mounting bolts or remove the filler tube from the tank. This will aid the fuel removal especially if you had problems accessing through the filler the electrical connector for the fuel pump and fuel level sender which will be in the same wiring harness. If access if difficult or you can't see them wait until the tank is lowered slightly to undo the connector. Inspect electrical connector for burns or heated spots and replace if damaged. A burned connector can cause a pump to fail will be fuel vapor lines as part of theEVAPsystem these will need to be removed or and release tank holder supports, there are two in most cases. Remove the mounting bolts at this point the tank will become loose but may not come the tank and release top mounted fuel lines or electrical connectors if any. Continue to remove the tank.
Picture(G)
Remove the tank, this will expose the fuel pump retainer ring. Use an aerosol cleaner to remove dirt and debris from the area. This will keep the inside of the fuel tank clean when performing the fuel pump mounting bolts or retainer ring to access the fuel pump module and remove the unit. Use a hammer and punch to remove the ring counterclockwise.
Picture(I)
Remove the fuel pump which will be attached to the mounting plate or positioned down inside the tank held by plastic retainer clips.
Picture(J)
Remove the fuel pump from the tank.
