2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 787

- Is the measurement value OK?

YES

The measurement value is OK.Test prerequisite

- Test pressure gage is connected.

Test sequence

- Switch off ignition.

- Insert bridge.:

- Bridge between sockets [F.2] 98 and [F.17] 113 of the 126-pole socket box tester.

- Switch on ignition.

- Component M3 (Fuel pump) runs.

- Switch off ignition.

- Remove bridge.

Specified value

- Pressure after 30 minutes:[> 2.5] bar

Question

- Is the measurement value OK?

YES

The measurement value is OK.Further possible causes of fault

- Test delivery of component M3 (Fuel pump).

NO

The measurement value is not OK.Possible cause and remedy

- In the event of slow pressure drop:Check component Y62 (Fuel injectors).

- 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)