C 230 (203.052) V6-2.5L (272.920) (2007)
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Drive vehicle onto highway with speed limit of 55 mph or higher.
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Accelerate vehicle slowly to 55 mph, then release gas pedal to decelerate down to 52 mph.
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Repeat procedure until Actual value counter reaches 6.
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Click "F2" once it becomes available to proceed to final test.
^ Perform final "Catalyst efficiency" test (Figure 7).
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While driving keep Catalyst temperature right, Catalyst temperature left, Exhaust flow right, and Exhaust flow left values in green area until test is
completed.
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DAS will automatically proceed to test results page.
3. Perform one of the following, depending on results of test (circled area of Figure 8):
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If text reads Catalyst right do not renew and Catalyst left do not renew: Disconnect Star Diagnosis and proceed to step 5.
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If text reads Catalyst right renew or Catalyst left renew: proceed to step 4 replace both catalytic converters.
4. Replace both catalytic converters; refer to WIS document AR49.10-P5531QB.
Note: