Tuesday, May 7, 2019

2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 1422


- Check the CAN communication with control unit A1 (Instrument cluster).



- Interior CAN bus



Affected functions:



- Fuel level indicator



- Engine running



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Test 1: Interior CAN bus



Test 2: CAN communication is faulty.



Test 3: Check component N10 (SAM control unit).



1. Interior CAN bus



Warning!Communication with ECU required.



2. CAN communication is faulty.



Test 2.1: Check the CAN communication with control unit A1 (Instrument cluster).



2.1. Check the CAN communication with control unit A1 (Instrument cluster).



Test 2.1.1: Check the CAN communication with control unit.



2.1.1. Check the CAN communication with control unit.



Warning!Communication with ECU required.



3. Check component N10 (SAM control unit).



Possible cause and remedy



- Read out fault memory of control unit N10/2 (Rear SAM control unit with fuse and relay module).



End of test



2340



Self-adjustment of the mixture formation of the left cylinder bank is erratic.



Possible cause:



- Selfadaptation of mixture formation



Affected functions:



- Engine output



-------------------------------------------------



Test 1: Check self-adaptation of mixture formation.



1. Check self-adaptation of mixture formation.



Test sequence



- Check actual value Selfadaptation of mixture formation.



- Carry out the following tests.



Continue with button F2



Warning!Communication with ECU required.



2342



The right fuel level sensor has a short circuit to ground.

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