The need to clean up the fuel filter shall signal the tell-indicator on the Hyundai Tucson instrument panel, but an extraordinary revision should be made on suspicion of a fuel system malfunction. To do this, you need to:
1. Dismantling the air filter body;
2. Disconnect the water supply sensor terminals from the fuel filter;
3. Substitue a suitable receptacle such as a cut PET bottle;
4. To release the plastic nut in the lower part of the clip, without dismissing it completely;
5. Water as long as it does not fuel the diesel fuel;
6. Round the nut and assemble everything in reverse order.