2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 673

Test sequence

- Measure direct current with multimeter between sockets [F.4] 100 and [M.54] 54 of the 126-pole socket box tester.

- Switch on ignition.

Specified value

- Amperage[0.6...1.2] A

Question

- Is the measurement value OK?

YES

The measurement value is OK.End of test

NO

The measurement value is not OK.Possible cause and remedy

- N10/1f57 (Fuse 57)

- N10/1kR (Circuit 87 relay, engine)

- Check lines from component N3/10 (ME-SFI [ME] control unit) to component Y110 (Three-disk thermostat valve).

- Y110 (Three-disk thermostat valve)

End of test

0857

B11/4 (Coolant temperature sensor) : Short circuit to ground (P0118)

Possible cause:

- B11/4 (Coolant temperature sensor)

- Y110 (Three-disk thermostat valve)

- The cooling performance of the engine cooling system is poor.

Affected functions:

- Engine cooling

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Test 1: The cooling performance of the engine cooling system is poor.