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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz C-Class (from 1993 to 2000, the year of issue)

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Mercedes-Benz C-class
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Fuel system
Fuel System Description
Introduction
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Fuel Level Sensor
Fuel pump
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Fuel Level Sensor



GAS ENGINE

Each fuel cell is the fuel level sensor display.

Withdrawal


PERFORMANCE ORDER
1. Drain the fuel tank. If only one sensor is dismantled, it is necessary to drain the fuel only from that compartment.
2. Remove the return hose (74) with a standard clip (011).
3. Remove the return hose on the support plate fuel level sensor (B4 / 1). To do this, loosen and slide back hose clamp.
A warning

The flowed out fuel collect rags or drain into a suitable container. Connecting input pipe close a suitable stopper or insert the hose into the net with a suitable bolt thread diameter.


4. Remove the ring nut (89/1). The garage is used for this special trunnion key. If you do not have a key, insert it into the slot of the safety ring suitable plastic wedge and loosen the ring of light hammer blows.
A warning

Do not use metal because of the risk of sparks.


5. Remove the fuel level sensor.
6. Remove the piping (88/3) and (88/4) with the jet suction pump on the fuel level sensor.

Setting

PERFORMANCE ORDER
1. Push the piping (88/3) and (88/4) on the fuel gauge.
2. Set the fuel level sensor, equipping it with a new profiled seal so that the sensor pins have engaged in the slots (88/2) of the fuel tank.
3. Screw the trunnion ring nut wrench to 55 Nm
4. Fit the drain hose and secure it with a hose clamp, remove the hose clamp.
5. Fill the fuel and the engine running, check the tightness of all connection points.

DIESEL ENGINE

Each fuel cell is a fuel level sensor.

Withdrawal

PERFORMANCE ORDER
1. Drain the fuel tank. If a sensor is removed, it is necessary only to release him terminals.
2. Disconnect standard clamp (011) drain the fuel line (70).
3. Remove the drain line to the stop plate of the gauge of level of fuel. To do this, loosen and slide back hose clamps.
A warning

Collect rags resulting residues of fuel or catch them in a suitable container. Flange pipe, close the cap, for example, clean with a suitable bolt diameter of the thread, which insert into the pipeline.


4. Remove the nut (89). The garage is used for this special trunnion wrench. If there is no such key, Put the safety ring in the groove of suitable plastic wedge and loosen the ring of light hammer blows.
A warning

Do not use metal: the danger of sparking!


5. Remove the fuel level sensor.
6. Remove the pipes (90) with the ejector pump for the fuel level sensor.

Setting

PERFORMANCE ORDER
1. Fit the pipe (90) on the fuel gauge.
2. Fuel level sensor core with a new O-ring (89/1), set so that the pins of the sensor engages in the grooves of the fuel tank.
3. Screw the screw-in trunnion nut wrench to 55 Nm
4. Place drain the fuel hose and secure it with a hose clamp. Remove the hose from the terminal.
5. Fill fuel and check the tightness of all connection points with the engine running.




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