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Check the power supply system, replacement of the fuel filter

Gasoline is highly flammable in, so when working with any components of the fuel system must take special precautions! Do not smoke, and do not go near the place of work with open flames or unprotected moving the shade. Do not perform such work in the garages equipped with heaters powered by natural gas (such as water heater, dryer, etc.)! The working area should be well ventilated. If any gasoline spills on your skin, immediately rinse it off with soap and water. When carrying out any work on the fuel system put on goggles and keep a fire extinguisher. In the event of spillage immediately wipe the puddle of gasoline, but do not hold the rags impregnated with gasoline in places where there is a risk of ignition it!

Checking System

PERFORMANCE ORDER

If you feel the smell of gasoline during movement or after the vehicle has stood in the sun, you should immediately check the condition of the entire fuel system. Remove the fuel tank cap and check for damage and corrosion. The sealing insert on the lid must be an integer. In case of damage or corrosion, replace the cover. Inspect the intake and return lines of the fuel system for cracks. Make sure that the connection lines between the fuel system and the fuel injection system, and the lines between the fuel system and built-in fuel filter is not weakened. On vehicles equipped with fuel injection before to serve fuel hoses, it is necessary to relieve pressure in the system (see chap. Power supply system and exhaust system)! Since some fuel system components - for example, some of the fuel tank and the fuel line system - at the bottom of the car, they are easier to inspect, when the car is raised winch. If this is not possible, Poddomkratte car and establish it on support. On the raised car examine a fuel tank and the filler neck for the presence of holes, cracks and other damage. Pay special attention to the state of the connection between the tank and the filler neck. Sometimes fuel leaks occur owing to easing of collars of fastening rubber mouth or because of material damage to the neck. Inspect all brackets and lentykrepleniya fuel tank to make sure that it is securely fastened to the vehicle. Never, under any circumstances, attempt to repair the tank (excluding the replacement of its rubber components). Flame welding machine, or any other open fire can easily cause an explosion of petrol vapors in the tank. Carefully check all fuel hoses and metal lines from the tank for loose connections, twists, signs of wear material hoses and other damages. If necessary, repair or replace the damaged section.

Replacement filter

Petrol models

Details of the installation of the fuel filter on petrol models

52 - The fuel line going to the engine 53 - the suction hose coming from the tank 55 - Fuel filter with integrated pressure regulator 74 - Hose fuel return line to the fuel tank 77/3 - Connector connection breather spring chamber	90/11 - return line 90/12 - pressure line 91/1 - Mounting bracket b - The air hose to the diaphragm pressure regulator M3 - Fuel Pump

PERFORMANCE ORDER

Details of the installation of the fuel filter on petrol models shown. Open the cover of the fuel tank in order to equalize the pressure therein to atmospheric. Remove the left rear wheel. Remove wheel arch locker protection. Disconnect from the pressure of the fuel filter assembly (90/12) and return (90/11) line - squeeze locking tabs on both sides of the castle, try to avoid twisting tubes. Disconnect the breather tube spring chamber (77/3). Release the mounting clip (91/1) and remove the fuel filter assembly with assembly connected to the front part of the pressure regulator. Assess the mounting bracket, in case of need make replacement. Installation is in the reverse order. Clamp fastening of the fuel filter tighten to 3 Nm. Start the engine and check the relevant elements of the fuel path for signs of leaks, if necessary, tighten fixing collars / connectors.

Diesel models

Details of the installation of the fuel filter on models 163.113 (ML 270 CDI) (1 of 2)

3 - Fuel cooler 4 - Bolts cooler 70 - Fuel filter	70/1 - the fuel supply line from the fuel tank 70/2 - the fuel return line to the fuel tank

Details of the installation of the fuel filter on models 163.113 (ML 270 CDI) (2 of 2)

70 - Fuel filter 70/1 - the fuel supply line from the fuel tank 70/2 - the fuel return line to the fuel tank 70/3 - Threaded ring 70/4 - Cover	70/5 - Seal 70/6 - Replacement filter cartridge 70/7 - The return fuel from the fuel line 70/8 - the fuel feed line to the pump swap

Details of the installation of the fuel filter on models 163.128 (ML 400 CDI)

1 - Bolts 2 - Screw 3 - Clamp	70 - Fuel filter 70/1 - the fuel input 70/2 - The output of the fuel

Details of the installation of the fuel filter in the diesel models shown.

Removal of air from the power supply system of the diesel engine

If the engine is stopped due to completely empty the fuel tank after refueling is necessary to remove air from the system power supply. To do this for no more than 60 seconds without interruption run the engine until it starts to work steadily.