My sister got a letter over the weekend from Dianler-Benz citing a recall on 2005 & 2006 C-Class. She has a 2006 C240. It states that an internal engine part has shown to be defective in some C-Class so they are repairing all 2005 & 2006 vehicles. Car goes to dealer tomorrow and she gets free loaner. Anyone know about this low-key recall??