Where is the fuel pump located in a Mercedes Benz?
Click here to order! In modern Mercedes-Benz automobiles the fuel pump is electric and located inside the saddle-fuel tank. The fuel pump creates positive pressure in the fuel lines, pushing gasoline to the fuel rail, where the DME controls flow to the engine via a programmed fuel injection map.
How does the W211 E55 fuel pump relay work?
(Note* – if one owns a W211 E55 AMG, this is not the fuel pump relay, it is the heat exchanger cooling pump relay.) Remove the fuel pump replay. Connect a fused jumper wire between the terminals indicated by red arrows. The inset photo shows the fused jumper in place. This will activate your fuel pump.
How to test the fuel pressure in a Mercedes Benz?
Pressure testing: Connect a fuel pressure test gauge to the test port (red arrow). Next, start or attempt to start the engine. The fuel pressure should be 3.7: 4.2 bar with the engine running or when cranking. Once you test the pressure, recharge the fuel system by cycling the key or running the fuel pump.
How to test battery voltage on Mercedes fuel pump?
The red arrow points to the battery positive feed to the pump. The yellow arrow points to the battery negative feed to the pump. You will be testing voltage across the large wires at the connector. Turn the key ON. The DVOM should read battery volts (around 12 volts). If no voltage is found, check the relay and the fuel pump fuse.
Click here to order! In modern Mercedes-Benz automobiles the fuel pump is electric and located inside the saddle-fuel tank. The fuel pump creates positive pressure in the fuel lines, pushing gasoline to the fuel rail, where the DME controls flow to the engine via a programmed fuel injection map.
(Note* – if one owns a W211 E55 AMG, this is not the fuel pump relay, it is the heat exchanger cooling pump relay.) Remove the fuel pump replay. Connect a fused jumper wire between the terminals indicated by red arrows. The inset photo shows the fused jumper in place. This will activate your fuel pump.
The red arrow points to the battery positive feed to the pump. The yellow arrow points to the battery negative feed to the pump. You will be testing voltage across the large wires at the connector. Turn the key ON. The DVOM should read battery volts (around 12 volts). If no voltage is found, check the relay and the fuel pump fuse.
What kind of car has a fuel pump?
The vehicle used in this tech article was a 2004 E320 4MATIC sedan with a 6-cylinder engine. The fuel pump relay position may vary depending on year and model. Double check your fuel pump relay location with the latest Mercedes Benz repair information.
The vehicle used in this tech article was a 2004 E320 4MATIC sedan with a 6-cylinder engine. The fuel pump relay position may vary depending on year and model. Double check your fuel pump relay location with the latest Mercedes Benz repair information.