This provides a fuel filter. Dirt particles settle on the filter element. And from below, in the free space of the filter, water can be deposited - it is heavier than fuel. For all diesel models, the fuel filter must be changed every 90,000 km.
Fuel filter replacement
"90,000 km every 4 years"
1. Disconnect the vacuum hose from the power brake booster.
Pic. 4.90. Fuel filter: 1 - fuel filter; 2 – fuel supply; 3 - protective plate; 4 – a bolt of the fine filter of fuel; 5 - fuel fine filter
2. Unscrew the filter cartridge (pic. 4.90) with strap key (e.g. for oil filter), unscrew the large nut at the top.
3. Remove the filter cartridge (must not be disposed of with household waste! Dispose of in special places).
4. Insert new cartridge and screw with new seal.
5. Tighten the bolt and chuck.
Checking the coarse fuel filter
Depending on the operating conditions, it is necessary to check the coarse filter for damage every 30,000 km and clean it if necessary. It is usually sufficient to replace the coarse and fine filters every 90,000 km or every 4 years.
"90,000 km every 4 years"
Pic. 4.91. Coarse filter location
1. Loosen the bolt on the coarse filter (pic. 4.91).
2. Bend the mounting plate and disconnect the fuel supply pipe.
3. Remove the filter from the fuel filter housing.
4. Rinse the dirty filter or blow it gently.