1. Damaged or Loose Hose: The bypass hose may have developed cracks or become loose, allowing diesel fuel to leak out. Check the entire length of the hose, paying special attention to the connections at both ends, and replace it if necessary.
2. Worn Injector Seals: The injector seals, also known as O-rings, may be worn or damaged, causing fuel to bypass the injectors and leak through the bypass hose. Replace the injector seals if they are found to be faulty.
3. High Fuel Pressure: Excessive fuel pressure can cause the bypass hose to leak. This can be due to a faulty fuel pump or a problem with the fuel pressure regulator. Have the fuel system checked and отремонтирован if necessary.
4. Clogged Fuel Filter: A clogged fuel filter can restrict fuel flow and cause pressure buildup, leading to leaks. Replace the fuel filter and inspect the fuel lines for any other blockages.
5. Faulty Fuel Supply Line: The fuel supply line to the injectors may be damaged or leaking, allowing fuel to escape and accumulate around the bypass hose. Inspect the fuel supply line and replace it if necessary.
To properly diagnose and fix the issue, it's recommended to have the vehicle inspected by a qualified mechanic or Mercedes-Benz specialist. They can accurately identify the source of the fuel leak and perform the necessary repairs to restore the system to its proper functioning condition.
