One problem related to engine stall has been reported for the 2012 Mercedes Benz C250. The most recently reported issues are listed below.
Engine was stalling upon initial startup. Took to mercedes and received an estimate for $4500 for a new timing chain and cam adjusters. The car only has 46000 miles on the odometer. After searching the blogs, I find that there are hundreds of complaints about this exact issue. Why isn't there a recall or TSB on this?.