On 2020-10-05 15:55, Allan Streib via Mercedes wrote:
In my experience this is almost always something emissions
related. Oxygen sensor, etc. Could also be any other abnormal sensor
reading such as fuel pressure.
My 2003 ML put up a CEL yesterday.
Scanned it today, and it was P0442, slight leak in evap system.
I interpret that as either 'my gas cap is 17 years old', or 'I'm tired
of being parked all the time'. Cleared the code and filled the tank,
will see what happens next.
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