2004 ML350 - No CEL, won't pass Smog, Drive Cycle Won't Reset after 1000 miles
Thread Starter
Junior Member
Joined: Jun 2016
Posts: 23
Likes: 7
2011 Mercedes C300 Sport
2004 ML350 - No CEL, won't pass Smog, Drive Cycle Won't Reset after 1000 miles
2004 ML350 - 188k miles - this has always been one of the 'good' ones. Runs excellent, fuel mileage has hardly changed.
IT is due for a smog inspection and registration. There is no check-engine-light on, however it will not pass smog as the computer does not have 'historical records' according to the mechanic.
They suggested that I drive the car a few hundred miles to reset the cycling of the engine diagnostics. So far I have driven over 1000 miles and it still is unable to pass Smog.
Any suggestions? Has anyone run into issues like this before? Would anyone recommend resetting the computer and has a procedure to do so?
Anything helps.
IT is due for a smog inspection and registration. There is no check-engine-light on, however it will not pass smog as the computer does not have 'historical records' according to the mechanic.
They suggested that I drive the car a few hundred miles to reset the cycling of the engine diagnostics. So far I have driven over 1000 miles and it still is unable to pass Smog.
Any suggestions? Has anyone run into issues like this before? Would anyone recommend resetting the computer and has a procedure to do so?
Anything helps.
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,346
Likes: 692
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
It sounds like the OBD system is not going to “Ready.” Suggest you scan for codes (many do not turn on CEL). Some transmission codes can affect the OBD drive cycle readiness.
Thread Starter
Junior Member
Joined: Jun 2016
Posts: 23
Likes: 7
2011 Mercedes C300 Sport
Update
Update - took 1000 miles of driving before the computer reset, as well as the service interval indicator being reset after a oil change/B maintenance. Passed Smog.
196,475 miles and she starts right up. These vehicles really do last if you take care of them.
196,475 miles and she starts right up. These vehicles really do last if you take care of them.
