Yes, mpolli, that thread’s answer to the P0105 code was a disconnected vacuum line from the MAP sensor, just like mine. However, I didn’t know where to look for the vacuum line or the MAP sensor, so I checked another forum for P0105 and found one with pics of the vacuum line and the sensor. That site is:

http://www.b e n z w o r l d.org/forums/r170-slk-class/1364929-oil-change-triggered-check-engine-light.html
(I added spaces in the URL in case the server removes other forum URLs from this site. Just remove the spaces.)

From those pictures I went right to the problem vacuum line and plugging in the dislodged vac line cured the stall/no-start problem as well as the remaining P0105 code. I’m not sure when it happened, but it could have been there from the beginning or popped out during the camshaft position sensor installation. The fix took a few days of troubleshooting, but it's much better than giving the mechanic $700, and likely more $, to throw parts AND LABOR at the problem. Thanks again all!