Changing The Fuel Filter In A Mercedes Sprinter Diesel

Changing the fuel filter on a Mercedes Sprinter diesel engine is a relatively straightforward process that can be done at home with the right tools and some prior knowledge. It is important to note that fuel filters are a crucial component of the fuel delivery system, preventing contaminants from entering the fuel system and causing damage. While the process may vary slightly depending on the model year of the Sprinter, the basic steps typically involve removing the air filter housing, heat shield, and old fuel filter, before installing a new fuel filter and reassembling the components. The frequency of fuel filter replacement can vary, but it is generally recommended to replace them every 20,000 to 30,000 miles, or when the \check engine\ light comes on.

Where to buy a new fuel filter

When it comes to purchasing a new fuel filter for your Mercedes Sprinter diesel, there are a few options to consider.

Firstly, it is recommended to source a fuel filter directly from Mercedes-Benz or their approved suppliers. This ensures that you receive a product that meets the original equipment specifications and guarantees a perfect fit with your Sprinter's diesel engine. You can order these parts online from the official Mercedes-Benz USA Parts website, which offers shipping directly to your door.

Alternatively, there are independent retailers that stock fuel filters compatible with the Mercedes Sprinter. These include:

• Sprinter Parts Depot: They offer a Genuine OEM Mercedes Fuel Filter for Sprinter models from 2004 onwards, priced at $78.
• AutohausAZ: They provide a range of fuel filters for various Mercedes Sprinter models, with prices ranging from $28.99 to $135.99. They offer brands such as Mann, Mahle, Hengst, UFI, and Bosch.
• Amazon: As suggested by a user on the Class B Forums, you can find Mann fuel filters on Amazon for around $52.

When purchasing a fuel filter, it is essential to verify the part number to ensure compatibility with your specific Mercedes Sprinter model.

Tools needed to change the fuel filter

To change the fuel filter on a Mercedes Sprinter Diesel, you will need a range of tools to ensure the job is done safely and effectively.

Firstly, you will need a flathead screwdriver to pop up the air vent on the two plastic connectors and to remove the cable on the driver's side by sliding it upwards. You will also need a Torx bit to remove the heat shield and to reattach it once the fuel filter has been replaced. A 5mm hex bit is required to open the clamp on the back of the filter cage. You will also need a 13mm and a 15mm clamp to tighten the high-pressure hoses, which can be tightened with a hex bit or a flathead screwdriver.

It is important to ensure that the engine is cool before beginning work, as there are hot parts around, including the filter itself. It is also recommended to use German parts and not aftermarket, as some aftermarket parts may be incompatible or cause issues.

Step-by-step guide to changing the fuel filter

Step 1: Allow the engine to cool down. The fuel filter and surrounding parts can get hot, so it is important to let the engine cool off before attempting to change the fuel filter.

Step 2: Remove the air filter housing. This will grant you access to the fuel filter. To do this, follow these five steps:

• Use a flat-head screwdriver to pop up the air vent on the two plastic connectors.
• Disconnect the black plastic air hose on the driver's side by snapping it off.
• Remove the cable on the driver's side by sliding it upwards.
• Loosen the clamp on the passenger side and remove the air hose.
• Remove the two electrical connectors from the passenger side.

Step 3: Remove the heat shield with a Torx bit. There are five spring-loaded screws that you need to turn 90 degrees to detach. Once the screws have been detached, pull out the metal piece and set it aside.

Step 4: The fuel filter is now accessible. To remove it, follow these steps:

• Open the clamp on the backside of the filter cage using a 5mm hex bit.
• Loosen the clamps on the two high-pressure hoses attached to the filter and pull them off.
• Disconnect the electrical connector by pulling it out.
• Lift the fuel filter out of its housing.

Step 5: With the fuel filter removed, you can now replace the two Torx screws and the plastic screw on top of the filter. Twist the black plastic insert inside the filter and pull it out.

Step 6: Remove the two rubber O-rings attached to the plastic insert and replace them with new ones. Lubricate the new O-rings with old engine oil, then put the insert into the new filter. Reattach the two Torx screws and the black plastic screw.

Step 7: Put the new fuel filter back into its casing in the engine compartment. Reattach the high-pressure hoses, tighten the clamps, and attach the electrical connector.

Step 8: Reattach the heat shield plate by sliding it into the two pins at the back and securing it with the five Torx screws.

Step 9: Put the air filter housing back on and make sure to reconnect the two electrical connectors.

It is important to note that you should always refer to your owner's manual for the manufacturer's recommended schedule for fuel filter replacement. Typically, fuel filters need to be replaced every 20,000 to 30,000 miles.

How to reset the check engine light

To reset the check engine light on your Mercedes Sprinter, you must first rule out or resolve any underlying issues. If the check engine light has come on, it is likely due to one of the following issues:

• Loosened or damaged fuel cap
• Failing oxygen (O2) sensor
• Clogged or damaged catalytic converter
• Malfunctioning Mass Air Flow Sensor
• Expired or damaged spark plugs

If you try to reset the light when there is a more serious underlying problem, it will come back on immediately. If you have resolved the issue, you can reset the check engine light in one of two ways.

The first way to reset the light is with an OBD II diagnostic scanner. Simply plug the scanner into your vehicle, read the related codes, and press "clear" or "reset". The light should now be off.

The second way to reset the light is by disconnecting the negative battery cable. Here's how to do it:

• Wear safety glasses and gloves for protection.
• Turn off the ignition and open the hood of your vehicle.
• Locate the battery and find the negative terminal. It is usually marked with a minus (-) sign and is typically black.
• Using a wrench, remove the cable from the negative terminal.
• Hold the negative cable to the side for 30-60 seconds. Be careful not to let the cables touch, as this will create sparks.
• If you have an assistant, ask them to engage the vehicle horn to deplete any excess power.
• Reconnect the negative battery cable.

When you restart your vehicle, the check engine light should no longer be illuminated. Please note that disconnecting the battery may also cause certain infotainment systems to reset.

How often to change the fuel filter

The fuel filter in a Mercedes Sprinter diesel engine should be replaced every 20,000 miles or once a year, according to the manufacturer's recommendations. This is a maintenance item, and it is important to replace the filter according to the service schedule, rather than just when a problem occurs.

Fuel filters are typically mounted to the undercarriage, on the main fuel line after the fuel pump. They trap particulates as the fuel flows through, preventing contaminants from entering the rest of the fuel system and causing damage.

When a fuel filter begins to clog, the engine suffers from fuel starvation, causing a significant reduction in power and potential misfires. This can cause the engine to stall, fail to start, or hesitate under throttle.

If you are unsure about how often to change the fuel filter, it is best to refer to your owner's manual, which will have the manufacturer's recommended schedule for replacement.

It is also worth noting that the cost of a fuel filter replacement can vary depending on the model year of your Mercedes Sprinter diesel.

Frequently asked questions