2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 192

- Battery voltage too low.Test battery.Charge battery, replace if necessary.

- If fault occurs again:Check alternator.Communication with ECU required

- The quiescent current is too high.Test quiescent current.

NO

Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Front SAM control unit with fuse and relay module)Test

prerequisite

- The relevant actual value is not okay.

- Battery voltage is OK.

- Fuse N10/1f51 (Fuse 51) is OK.

Test sequence

- Switch off ignition.

- Disconnect connector at component N71 (Headlamp range adjustment control module).

- Measure direct voltage with multimeter between sockets (N71) 20 and (N71) 19

- Switch on ignition.

Specified value:Voltage = [11.0...14.5] VQuestion

- Is the measurement value OK?

YES

The measurement value is OK.Figure legend 1:N71 (Headlamp range adjustment control module)Figure legend 2:N10/1 (Front SAM control unit

with fuse and relay module)Possible cause or remedy in case of malfunction

- Inspect plug connections N71x1 and (N10/1) 24 for damage, loose contact and corrosion, and repair if necessary.

- N71 (Headlamp range adjustment control module)