2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 556

Test prerequisites

- First of all process all other current fault codes.

POSSIBLE CAUSES

- Component Y3/8n4 (Fully integrated transmission control (VGS) control unit) is defective.

Preconditions

- Print out the initial quick test log before processing the fault code 0633.

- Create control unit log.

Important notes before commencing repair measures

- Always use the same diagnostic unit after the repair measure.

Continue with button F2

Sequence

- Data are being read from the old control unit.

Start process with button F2.

1. No further information available.

ME9.7

Misfiring of cylinder 1 : Damages TWC (P0301)

Possible cause:

- Combustion misfirings

Affected functions:

- Engine diagnosis

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Test 1: Combustion misfirings

1. Combustion misfirings

Warning!Communication with ECU required.

0634

Misfiring of cylinder 1 : Worsening of exhaust emission values (P0301)

Possible cause:

- Combustion misfirings

Affected functions:

- Engine diagnosis

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Test 1: Combustion misfirings

1. Combustion misfirings

Warning!Communication with ECU required.

0636

Misfiring of cylinder 1 : Worsening of exhaust emission values after engine start (P0301)