Mercedes-Benz C Class 204 MY2008-2011 and R Class 251 MY2009-2013 Passenger Cars (extended recall)
Airbag inflator: As it gets older, a combination of high temperatures and humidity can cause the airbag inflator propellant to degrade. If an affected vehicle is involved in a collision triggering the airbag, the metal inflator housing may explode/rupture under too much internal pressure.