2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 769

- Switch on ignition.

Status of relevant actual value:

- HFM-SFI ( Reference signal ):Warning! Communication with ECU required.

Specified value

- Reference signal[46...59] ms

Question

- Is the measurement value OK?

YES

The actual value is okay.End of test

NO

The actual value is not o.k.Possible cause and remedy

- Check lines from component N3/10 (ME-SFI [ME] control unit) to component B2/5 (Hot film mass air flow sensor).

- B2/5 (Hot film mass air flow sensor)

2.1.3. Check seal of component B2/5 (Hot film mass air flow sensor) with air filter for cracks.

Possible cause and remedy

- Check seal of component B2/5 (Hot film mass air flow sensor) with air filter for cracks.

Note

- Proper sealing between the air cleaner housing and the housing of the HFM mass air flow sensor must be assured.

End of test

2.1.4. Inspect air cleaner housing.

Possible cause and remedy

- Inspect air cleaner housing for correct installation.

Note

- Proper sealing between the air filter housing and the housing of the HFM mass air flow sensor must be guaranteed (the gasket surface must not