Fuel Filter Change For Your 1999 Ml320: When And Why

If you're wondering when to change the fuel filter on your 1999 Mercedes ML320, you should know that it's generally recommended to do so every 50,000 miles or so. However, some sources suggest that the fuel filter should be replaced annually for peak performance. This process can be done yourself, but it is a pain and you may need some special tools to do so. You can also take your car to a mechanic to have it done. Either way, it's important to keep your fuel filter clean to prevent engine system failures and costly malfunctions.

Fuel filter change DIY

Step 1: Purchase a new fuel filter

You can purchase a new fuel filter from a Mercedes dealership or online. If you are buying online, make sure to select the right product for your vehicle by using the fitment form on the website.

Step 2: Prepare your vehicle

Park your car on a level surface and engage the parking brake. Make sure the engine is cool before you start working.

Step 3: Locate the fuel filter

The fuel filter on a 1999 ML320 is located near the rear driver-side wheel. You will need to remove the wheel and the plastic inner wheel well to access it.

Step 4: Remove the old fuel filter

Disconnect the fuel lines from the old fuel filter. You may need a special tool called fuel line pliers to do this. Be careful not to break the lines as they are fragile.

Step 5: Install the new fuel filter

Connect the new fuel filter to the fuel lines. Make sure the lines are securely attached before positioning the filter.

Step 6: Re-attach the wheel and inner wheel well

Once you have installed the new fuel filter, you can re-attach the wheel and inner wheel well.

Step 7: Start the vehicle and check for leaks

Turn on the ignition and let the vehicle run for a few minutes. Check the area around the fuel filter for any signs of leaks.

Additional Tips:

• It is recommended to change your fuel filter annually for peak performance.
• If you are having trouble locating or removing the fuel filter, you can refer to online forums or consult a mechanic.
• Be careful not to spill fuel on any hot engine components to avoid the risk of fire.
• Always wear protective gear, such as gloves and eye protection, when working on your vehicle.
• Dispose of the old fuel filter properly according to local regulations.

By following these steps, you can change the fuel filter on your 1999 Mercedes ML320.

Fuel filter and fuel pump change

When to change the fuel filter and fuel pump

It is recommended that you change the fuel filter on your 1999 Mercedes ML320 every 50,000 miles. As for the fuel pump, while there is no standard maintenance schedule for replacement, it is a good idea to replace it when you replace the fuel filter as the parts needed to access the fuel filter will be the same for the fuel pump.

Parts needed

• Fuel filter
• Fuel pump
• Fuel lines (if you have the shorter, original fuel filter)
• Fuel line connector tool (optional, but recommended)

Step-by-step guide

• Remove the rear wheel and the plastic inner wheel well.
• Access the fuel filter. You may need to partially move the driver's side rear seat to gain more space.
• Remove the fuel filter. You will need to disconnect the fuel lines from both ends of the filter. If you have the special fuel line connector tool, use it to depress the tabs and remove the lines. If you don't have the tool, try pushing both tabs forward a little and then depressing them. Be careful not to break the lines as they are fragile.
• Install the new fuel filter. Make sure to connect the fuel lines before positioning the filter.
• Cycle the key a few times to get fuel to the injectors.
• To access the fuel pump, remove the rear seat and the access panel on top of the fuel pump.
• Disconnect the fuel lines from the fuel pump.
• Install the new fuel pump and connect the fuel lines.

Fuel filter location

The fuel filter on a 1999 Mercedes ML320 is located at the back left tire, above the frame. You can see the filter by looking behind the left rear tire, towards the front, just under the plastic wheel well liner.

The fuel filter is relatively easy to access and change. You will need to remove the rear wheel and fender liner to access the filter, as there isn't much room to work with otherwise.

The removal and installation process is the same for all years of the ML320. However, in April 2001, Mercedes changed the filter design, making it longer and requiring additional lines. This means that if your VIN is less than 266446, you will need to source the upgraded filter and lines.

It is recommended to change the fuel filter every 20,000 miles for diesel engines or every 26,000 miles if you have a 13,000-mile interval.

Fuel filter parts and cost

The fuel filter in the Mercedes ML320 is located behind the rear driver's side wheel and the plastic inner wheel well. The filter is difficult to access and requires a special tool to remove the fuel line connector.

There are several fuel filter parts available for the Mercedes ML320, with prices ranging from $42.99 to $84.99. The specific part required depends on the model year and chassis number of your vehicle.

For example, the Carquest Premium In-line Fuel Filter with Sensor Port is available for $88.99, while the Beck/Arnley Fuel Filter can be purchased for $42.99.

Additionally, the fuel filter assembly offered by Evan Fischer, compatible with the 1999 Mercedes ML320 3.2L, is priced at $50.83.

It is recommended to replace the fuel filter annually for optimal performance and to prevent engine issues.

Fuel filter change intervals

The fuel filter in your 1999 Mercedes ML320 should be changed every 50,000 miles. However, some sources suggest that the fuel filter should be replaced annually for peak performance.

One source recommends changing the fuel filter every 20,000 miles if it is a diesel engine, or every 26,000 miles if you have a 13,000-mile interval.

Another source suggests that the fuel filter should be changed every 25,000 miles.

It is important to note that the location of the fuel filter in the ML320 is not ideal, and the process of changing the fuel filter can be difficult. You may need to remove the rear wheel and the plastic inner wheel well to access the filter. Additionally, you may need a special tool called a 163 fuel line pliers (part number 163 589 00 37 00) to remove the connectors on the fuel filter.

When changing the fuel filter, it is recommended to also change the fuel pump as it is located in the same area and requires similar steps for access.

• Carquest Premium In-line Fuel Filter with Sensor Port ($88.99)
• Beck/Arnley Fuel Filter ($42.99)
• Purolator Fuel Filter ($61.99)
• Duralast Fuel Filter FF787DL (price not listed)
• Fram Fuel Filter PS10265 (price not listed)

Frequently asked questions