One problem related to wiper has been reported for the 2013 Mercedes Benz C300. The most recently reported issues are listed below.
Driving home on northbound I-5 in seattle. Very loud noise like a small explosion. The front part of the panoramic sunroof exploded! there were no over passes or cars nearby. No other apparent damage anywhere. Outside/exterior sunroof looked fine (see photos). It was raining at the time. The sunroof, although shattered, did remain intact, however started leaking. This appears to be a very common problem (do any type of internet search on panoramic sunroof exploding). Please investigate.