I have a scan gauge II that would not read the code when my ML's cel came on...the local shop had a reader that worked and he fixed the problem.

Now, a couple months later, the CEL came on again and then went back off, but no codes shown on the scan gauge.

I checked out the Actron readers and see the they do not list MB in the supported vehicle list. Does the ML-350 take a special reader?

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2008 ML350
2007 Honda Element
2007 Honda Accord
2009 Honda Civic