Thanks - I did get a MB mechanic to scan it, and I am aware that it is a code for the evap system. Most common culprit is an old gas cap, which does not appear to be issue here. Another common issue is with the purge valve (000-470-88-93), which looks new/recently replaced.

I'd rather fix this on my own but I'll take it to my mechanic if necessary. Just wondering if anyone else has experience with this code and the repairs associated with it.