2. Disconnect the fuel lines (2) from the fuel filter (1).
3. Disconnect the electrical connector (3) of the water level sensor in the filter (6) (only for vehicles equipped with a water separator - equipment code KL5).
4. Disconnect the drain pipe (4) from the filter (1) (only for vehicles equipped with a water separator - equipment code KL5).
5. Loosen the screws (5).
6. Remove the fuel filter (1),
7. Remove the fuel filter water level sensor (6) (only for vehicles equipped with a water separator - equipment code KL5).
VN 1.013 Shown in example 646.982
1. Fuel filter
2. Fuel lines
3. Electrical connector
4. Drain pipe
5. Screws
6. Fuel filter water level sensor
7. Sealing rings
Attention: when installing the filter, make sure it fits correctly in the fasteners.
(Original source of information: «mercedesman»)
8. Perform installation in reverse order. Tightening torque of fastening screws: 8 Nm.
9. Turn on the ignition, start the engine and check for fuel leaks while the engine is running.