These suggestions and solutions for technical problems are from service bulletins and other information published by Mercedes-Benz, selected and adapted for independent repair shops.
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When is a vacuum leak not a vacuum leak?
When it’s hiding in the EVAP system of a Porsche Cayenne.
A P0455 code points to an EVAP problem, but the EVAP system checks out OK with our smoke tester. And the purge valve checks out as well. So where could the problem lie?
Our derFix Super Sleuths unravel the mystery.