How Do I Replace the Fuel Filter on a 2001 BMW 330i

1. Open the glove box. Open the fuse box by turning the two white tabs on either side of it. Remove the #54 fuse, which controls the fuel pump. Remove the gas cap. Start the engine and let it run until it stalls from lack of fuel.
2. Raise the BMW with a floor jack. Lower it onto jack stands at all four corners. Remove the fuel filter protective panel, which is located under the car just to the front of the drivers seat. The panel is held on with four screws that are removed with a Phillips screwdriver.
3. Remove the metal clamp that holds the fuel filter in place using your hand. Loosen the six hose clamps that fasten the fuel lines to the fuel filter. Place a container under the filter to catch spilled fuel. Pull the hoses off of the filter. You may need to twist the hoses with pliers to get them off of the filter.
4. Drain the excess fuel from the filter into the container. Discard the filter. Install the new fuel filter in the same orientation as the old one. Slide the fuel lines onto the new filter. It is recommended to replace the BMW hose clamps with conventional hose clamps that can be tightened with a screwdriver, as the original clamps require a special tool to tighten easily. You can also use a pair of pliers to tighten the original hose clamps a little at a time.
5. Reinstall the clamp that holds the filter in place. Reinstall the oil filter protective panel. Lower the car back to the ground. Reinstall the #54 fuse. Put the fuel cap back on. Start the car and check for leaks.

How to Replace a 1999 C230 Benz Fuel Sending Unit

1. Park your C230 in a safe, level location. Engage the parking brake or apply blocks to the wheels to prevent the vehicle from rolling. Open the trunk. Locate the trunk service area on the driver side wall of the trunk. Open the service area using a flathead screwdriver to open the release clips.
2. Locate the fuse box inside the service area. Open the fuse box panel using a flathead screwdriver. Locate the fuel relay inside the rear fuse box. Gently pull the fuel relay to disconnect the fuel relay.
3. Open the vehicles hood. Disconnect the negative cable from the battery. Locate the fuel filler cap on the passenger side of the vehicle. Open the cap and insert a manual fuel siphon pump. Remove the fuel from the fuel tank using the siphon pump.
4. Raise the rear of the vehicle using a car jack. Apply jack stands to the rear axles to keep the vehicle elevated. Crawl underneath your vehicle from the rear. Locate the fuel tank on the passenger side of the vehicle. Support the fuel tank by applying a car jack underneath the tank.
5. Locate the first aid box inside the trunk area on the package tray. Open the first aid box and remove the first aid kit inside it. Inspect the package tray closely. Notice the package tray is secured by two screws. Loosen and remove these screws using a screwdriver.
6. Remove the package tray from the trunk area. Set the package tray aside in a safe location. Inspect the area where the package tray was located. You should now be looking at the top of the fuel tank.
7. Locate the cover for the fuel sending unit at the top of the fuel tank. Remove the cap of the fuel sending unit using a flathead screwdriver to pry the cap off. Set the cap aside. Underneath the cap is the fuel sending unit.
8. Remove the fuel sending unit using an adjustable wrench. Unscrew the unit and pull it up and out of the fuel tank. Discard the old fuel sending unit.
9. Replace the fuel sending unit by sliding a new unit into the fuel tank. Replace the cover for the fuel sending unit. Ensure the cover is screwed tightly to prevent a fuel vapor leak. Replace the package tray in to the trunk and secure it with the screws you previously removed. Return the first aid kit. Replace the fuel relay into the rear fuse box.
10. Remove the jack stand underneath the fuel tank and lower the vehicle to the ground. Reconnect the negative cable to the battery. Refill the fuel tank. Turn on the ignition. Allow the vehicle to idle for at least 10 minutes to pressurize the fuel system. During this time, inspect underneath the vehicle for a fuel leak.