2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 642

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Test 2: Check self-adaptation of mixture formation.



Test 3: Check component G3/3 (Left O2 sensor, before TWC [KAT]).



1. Check exhaust system for leaks.



Possible cause of fault



- Leakage on catalytic converter at flange connection to exhaust manifold and in area of O2 sensor



Possible remedy



- Check O2 sensor for correct seating, tightening torque and leaktightness.



- Check weld seams on catalytic converter for leaktightness.



End of test



2. 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.



3. Check component G3/3 (Left O2 sensor, before TWC [KAT]).



Warning!Communication with ECU required.



722.9 (7-gear) ETC2 as of 2008



The internal electrical check of component Y3/8y5 (B1 brake control solenoid valve (VGS)) has failed.



Possible cause:



- Y3/8y5 (B1 brake control solenoid valve (VGS))



Affected functions:



- Automatic transmission Function



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Test 1: Remedial action if component 'Y3/8y5 (B1 brake control solenoid valve (VGS))' is faulty



1. Remedial action if component 'Y3/8y5 (B1 brake control solenoid valve (VGS))' is faulty



Operation number of operation texts and work units or standard texts and flat rates:27-0641Cause



- Component Y3/8y5 (B1 brake control solenoid valve (VGS)) is defective.



REMEDY



- Disassemble and assemble automatic transmission using the repair instructions.



- Exchange electrohydraulic control unit.



Notes on submitting warranty or goodwill claimsSEAG damage code (7 digits): 53384 73IMPORTANT NOTEFollowing the repair measures, the



following checks MUST be carried out using the Diagnosis Assistance System, menu 'Initial startup'



- Initial startup with manual settings input for new control unit



Continue with button "F2"

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