Mercedes C-Class

W203 since 2000 of release

Repair and operation of the car


Mercedes-Benz
+ Mercedes-Benz cars of class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling system and heating
- Power supply system and release
   - Power supply system of the petrol and diesel engine
      Dropping pressure in fuel system
      Removal and installation of the fuel pump and sensor of a reserve of fuel
      Removal and installation of the air filter
   + System of injection of fuel of the petrol engine
   + System of injection of fuel of the diesel engine. Turbocompressor
   + Systems of release and decrease in toxicity of the fulfilled gases. Turbocompressor
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


a45480c7





Removal and installation of the fuel pump and sensor of a reserve of fuel

Fuel tank, pump and sensor of a reserve of fuel. Petrol engine

1 — the Fuel tank
2 — the Block of the fuel pump and the sensor of a reserve of fuel
3 — the fuel reserve Sensor left
4 — the Profile sealing ring 		5 — the Round nut
6 — the Fuel filter
7 — the Right camera
8 — the Left camera

Petrol engine: The electric fuel pump together with the sensor of a reserve of fuel is in the right half of the fuel tank. Separately they cannot be replaced. The second sensor of a reserve of fuel is located in the left camera of the fuel tank.

Diesel engine: As fuel is sucked in from the toplivopodkachivayushchy pump with the cam drive, in a tank only sensors, respectively everyone in the camera of the fuel tank are located.

Before removal of a tank it is necessary to empty it in the course of the movement of the car or to pump out fuel the special pump in the capacity intended for this purpose. It is necessary to monitor good ventilation of a workplace at the same time. The radial fan which electric motor is located outside an air stream can be used to this purpose.

At removal of the fuel pump a fuel quantity can flow out. Fuel vapors are poisonous and flammable. Therefore it is necessary to monitor good ventilation of a workplace. Exclude hits of fuel on skin. You wear the gloves resistant in relation to fuel influence. Do not use naked flame!


Removal

 PERFORMANCE ORDER

Here removal of the sensor of a reserve of fuel of the diesel engine is described. At the petrol engine removal is made similarly.


For carrying out the following works do not connect the auxiliary power supply since the monitor can be damaged by the engine.

1. Disconnect a negative cable (-) of the rechargeable battery at the switched-off ignition. It is previously necessary to remove a box of the filter of air of salon.

Before a detachment of a cable find out a protective code of the radio receiver if that is available, address the Section Replacement of the Rechargeable Battery.

2. Empty the fuel tank. At a full tank suck away about 20 l of fuel from the right camera.
3. Cast away pillows of a seat forward or remove them.
4. Cast away a floor covering back.

5. Turn off both covers (1).

6. Disunite the socket the left (2) sensors of a reserve of fuel.

7. Disconnect the pipeline of a supply of fuel (3) and return of fuel (4) at the left sensor of a stock.
8. Turn off by means of a cam key round nuts (5). If the specified tool is unavailable, unscrew the sensor by means of an alligator wrench or a core from a firm tree and easy blows of the hammer.

Emergence of a spark since it can be a cause of the fire is not allowed.

9. Uncover (6) with a profile sealing ring.
10. Take out the right sensor of a reserve of fuel a little.
11. Disunite the socket of the right sensor.
12. If the sensor is replaced, disunite connecting pipes on the right sensor.

New sensors of a stock are equipped with couplings on connecting pipes.

13. Take out carefully both sensors from a tank. At the same time enclose a rag and wipe the following fuel.


Installation

 PERFORMANCE ORDER

1. Clear the interfaced surfaces on a tank and on stock sensors.

Hit of dirt in the fuel tank is not allowed.

2. Install on the left sensor new laying from the profile rubber made in order that it could not get to the fuel tank.
3. Pass connecting pipes and the plug through the fuel tank.
4. Remove a profile sealing ring from the left sensor and establish it on a tank.
5. Join couplings or connecting pipes.
6. Join an electric wire of the right sensor of a stock.
7. Install the right sensor with a new profile sealing ring.
8. Establish a fuel reserve sensor cover so that tags on a cover and the fuel tank coincided.
9. Tighten round nuts the moment of 85 Nanometers.
10. Put on a hose of a supply and removal of fuel the left sensor and fix by collars.
11. Join the socket of the left sensor of a reserve of fuel.
12. Check a sealing cord of a cover of the fuel tank and if necessary replace.
13. Establish a cover and wrap it on the bottom.
14. Cast away a floor covering back.
15. Cast away back or establish a seat pillow.
16. Attach a negative cable (-) to the rechargeable battery at the switched-off ignition. Establish into place a box of the filter of air of salon. Enter a code of the radio receiver and determine time on hours.


Petrol engines

Removal

 PERFORMANCE ORDER

Here only difference from the diesel engine is described.

1. Disconnect collars of fastening of a pillow of a seat.
2. Turn off a cam key a round nut (5) of the fuel pump and sensor of a reserve of fuel (2). If the specified tool is unavailable, unscrew the sensor by means of an alligator wrench or a core from a firm tree and easy blows of the hammer.

Emergence of a spark since it can be a cause of the fire is not allowed.

3. Disunite the socket of the right sensor of a reserve of fuel.
4. Disconnect a fuel supply hose from the fuel pump.

The right sensor and the fuel pump form uniform knot.

5. Take out the right sensor of a reserve of fuel a little.
6. Disconnect a hose of removal of fuel from the right sensor.
7. Carefully take out the fuel pump with the right sensor from the fuel tank. Enclose a rag and wipe the following fuel.


Installation

 PERFORMANCE ORDER

1. Clear the interfaced surface of the fuel tank and the holder of the fuel pump.

Hit of dirt in the fuel pump is not allowed.

2. Check three support of the sensor of a reserve of fuel at the bottom of a tank, if necessary replace the block of the fuel pump and the sensor of a reserve of fuel.
3. Put on a hose of discharge of fuel the right sensor.
4. Put on a fuel supply hose the fuel pump.
5. Carefully insert the fuel pump with the sensor and a new sealing ring and check their situation. The tag on a cover has to coincide with a tag on a tank.
6. Establish a new profile sealing ring.
7. Wrap a ring nut and fix by its moment 85 Nanometers.
8. Fix collars of a pillow of a back seat.