Sylvie Willis
Changing the fuel filter on a 1999 Mercedes-Benz is a complex process that requires a lot of prior knowledge. The fuel filter is located somewhere between the tank and the engine. To replace it, you must first relieve the fuel pressure by unplugging the fuse or relay. Then, disconnect and remove the filter, and replace it with a new one. You will also need to replace the fuse or relay.
| Characteristics | Values |
|---|---|
| First step | Relieve fuel pressure by unplugging the fuse or relay |
| Location of fuel filter | Somewhere in between the tank and the engine |
| Next steps | Disconnect and remove the filter, put in the new one, and replace the fuse or relay |
| Additional info | Your owner's manual or other vehicle documentation will have more info |
| Additional info 2 | You can hot wire the pump to see if it is the noise maker, but this would require removing the seats to gain access |
| Additional info 3 | You will need to lift the chassis off the frame to replace the hose |
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What You'll Learn
Relieving fuel pressure by unplugging the fuse or relay
To relieve fuel pressure by unplugging the fuse or relay, first locate the fuse or relay. This can be found somewhere between the fuel tank and the engine. Once you have located the fuse or relay, simply unplug it.
Working under the car and laying on your back, you will then need to disconnect and remove the old fuel filter. The fuel delivery assembly is located behind the rear axle on the passenger side. Be sure to get a hose removal tool and go slowly when you crack the hose to the engine. You will need to lift the chassis off the frame to replace it.
Once you have removed the old fuel filter, you can put in the new one and replace the fuse or relay.
You will need more specific information on this process, especially if you are not seeking help from a Mercedes-Benz service centre. You can find this information in your owner's manual or other vehicle documentation.
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Locating the fuel filter
To relieve the fuel pressure, unplug the fuse or relay. You will then be able to disconnect and remove the filter.
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Disconnecting and removing the filter
It's important to note that you'll need to work under the car and lay on your back to access the filter. Additionally, the fuel delivery assembly is located behind the rear axle on the passenger side.
Before disconnecting and removing the filter, you may want to hotwire the pump to determine if it's the source of any noise. If you do replace the filter, it's recommended to also change the fuel pump unless you know the previous owner has recently done so.
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Installing the new filter
To install the new filter, first relieve fuel pressure by unplugging the fuse or relay. Then, disconnect and remove the old filter. Put in the new one, and replace the fuse or relay. You will need to use a hose removal tool to crack the hose to the engine. You will also need to lift the chassis off the frame to replace the hose.
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Replacing the fuse or relay
To replace the fuse or relay on a 1999 Mercedes Benz, first relieve the fuel pressure by unplugging the fuse or relay. The fuel filter is located somewhere between the tank and the engine. Disconnect and remove the filter. Put in the new one and replace the fuse or relay. You can find more specific information in your owner's manual or other vehicle documentation.
You can also hotwire the pump to see if it is making noise, but this would require removing the seats to gain access. If you are replacing the filter, you should also change the fuel pump unless you know the previous owner has already done so. The pressure regulator is in the filter. To replace the hose, you will need to use a hose removal tool and lift the chassis off the frame.
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Frequently asked questions
First, relieve fuel pressure by unplugging the fuse or relay. Then, find the fuel filter; it's somewhere in between the tank and the engine. Then, disconnect and remove the filter. Put in the new one, and replace the fuse or relay.
The fuel filter is located somewhere in between the tank and the engine.
Yes, you will need to remove the seats to gain access to the fuel filter.
Your owner's manual or other vehicle documentation will have more information on how to replace the fuel filter.
