245819 Removing and Installing Fuel-Pressure Regulator For Low Pressure on DFI Engines
WM 245819 Removing and installing fuel-pressure regulator for low pressure on DFI engines
Tools
Technical values
Preliminary work
DANGER
Danger of poisoning from fuels.
-> Gasoline is toxic.
-> Inhaling vapours can cause irritation of the mucous membranes and eyes.
-> It can be carcinogenic. It represents a serious risk to health when inhaled, touched or swallowed over longer periods.
-> Only work on the fuel system in well-ventilated rooms.
-> Wear protective gloves that are fuel-resistant.
-> Wear a breathing mask with active charcoal filter; do not breathe in any fuel vapours.
-> Ensure that there is adequate ventilation and extract all fuel vapours.
-> Before opening the fuel lines or fuel hoses, relieve the fuel pressure.
-> Collect escaping fuel, absorb it if necessary with a suitable binding material and dispose of properly.
-> Pay attention to cleanliness when working on the fuel system.
DANGER
Danger of fire from fuel.
-> Keep clear of ignition sources.
-> Do not smoke.
-> Disconnect battery.
-> Danger of fire due to naked flames and sparks, e.g. during welding or grinding work.
-> Danger of fire due to escaping fuel, e.g. on hot engine components or due to electrostatic charge. Allow engine to cool down.
-> Secure the vehicle, e.g. with a warning sign.
-> Change any clothing soaked with fuel immediately.
-> In case of fire, use CO2 or dry powder fire extinguishers.
Information
The fuel filter is integrated in the left connection unit, while the pressure regulator is in the right connection unit. The instructions for opening the fuel tank can be used for both connection units (pressure regulator in the right and fuel filter in the left).
Relieve the fuel pressure =>
1. Switch off the ignition.
2. Pull out fuses 13 and 14.
3. Start the engine and wait until the engine starts up automatically.
1. Loosen rear seat and fold it up. Secure to the headrest using a piece of wire if necessary.-> 724819 Removing and installing rear seat - section on "Removing" 724819 Removing and installing rear seat (single-seat look)
5. Loosen reinforcement plate for right seat-belt buckle. To do this, loosen the three fastening screws and twist the plate with the seat-belt buckle to the side. Do not use the fastening screws again.
Fastening screws in retaining brackets for seat-belt buckles
6. Loosen the right cap (figure shows both) -arrows-. To do this, remove the carpeted floor. Then loosen the four fastening nuts and remove the cap.
Fastening nuts on caps
Left and right connection units
7. Disconnect all connections on the connection unit. Pull off cable plug.
Fuel supply and connection points on connection unit (illustration on right)
8. Open the right lock using special key T10202 and lift up the connection unit. => Special tool on cap
Special tool on cap
Removing fuel-pressure regulator for low pressure on DFI engines
1. Disconnect the electric connectors and plug connections for the fuel lines on the right connection unit -1-. Then remove the connection unit (pressure regulator) completely.
Left and right connection unit
Installing fuel-pressure regulator for low pressure on DFI engines
Information
- The pressure regulator is integrated into the connection unit.
- The connection unit together with integrated pressure regulator is replaced as a complete unit and not disassembled.
1. Fit a new seal in the opening of the fuel tank. => Seal
Seal
2. Connect the right connection unit with integrated pressure regulator. -1-
Left and right connection unit
3. Fit the connection unit into the tank. When doing so, make sure that the plastic lug is pointing forward.
Subsequent work
1. Close the fuel tank. To do this, fit the sheetmetal ring on the connection unit and tighten using special key T10202. => Caps => Tightening torque: 140 Nm (104 ftlb.)
Caps
2. Fit all connections (fuel lines, ventilation tubes and electric connectors). => Fuel lines, ventilation tubes and electric plugs
Fuel lines, ventilation tubes and electric plugs
3. Fit caps. Then tighten the four fastening nuts on each cap. => Fastening nuts on caps => Tightening torque: 10 Nm (7.5 ftlb.) Refit carpeted floor and fix in place with double-sided adhesive tape.
Fastening nuts on caps
4. Tighten the mounting plates for the seat-belt buckles. Use three new fastening screws. => Fastening screws for retaining brackets for seat-belt buckles For information on tightening torques, see -> 692519 Removing and installing rear belt lock 692519 Removing and installing rear belt lock
Fastening screws for retaining brackets for seat-belt buckles
5. Fold rear seat down again.