2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 759

- In the event of rapid pressure drop:Check valve in component M3 (Fuel pump)

NO

The measurement value is not OK.Possible cause and remedy

- N10/2f4 (Fuse 4)

- N10/2kA (Fuel pump relay)

- Test current consumption of component M3 (Fuel pump).

- Fuel filter with integrated pressure regulator

1.1.3.2. Test delivery of component M3 (Fuel pump).

Figure legend

- A -ConnectionTest cable 35-pin socket box

- 001 -Sockets of component N3/10 (ME-SFI [ME] control unit)

- 05 -35-pin socket box

- 050 -126-pin socket box

- 108 -Test cable 266 589 01 63 00

- N3/10 (ME-SFI [ME] control unit)

- II 1-63ConnectionTest cable

- III 64-126ConnectionTest cable

Warning!

- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050).

Continue to test with button F2

Figure legend

- 055Measuring beaker

Test sequence

- Switch off ignition.

- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).

- Separate fuel feed hose at the fuel line and hold in a suitable measuring beaker.

- Insert bridge.:

- Bridge between sockets [F.4] 100 and [F17] 113 of the 126-pole socket box tester.

- Switch on ignition.<->Component M3 (Fuel pump) runs.

Specified value

- 1 liters of fuel should flow in a maximum of 20 seconds.