DELIVERY STOP: N63R AND N63M ENGINE - CHECK ENGINE OIL SUPPLY CIRCUIT FOR CONTAMINATION. The engine oil pan and oil lubrication circuit may be contaminated with metal debris from the engine manufacturing process. AFFECTED VEHICLES This Recall Campaign) involves G12, G30 and G05 vehicles produced from June 26th 2018 to September 24th 2018. Vehicles which require this Recall Campaign to be completed will show it as "Open" when checked either in AIR, the "Service Menu" of DCSnet (Dealer Communication System) or with the Key Reader.