It’s important to provide cooling for Porsche’s engine with 4.8 liters volume. There is no chance 2011 Panamera engine will work efficiently with bad cooling. Only exact type of antifreeze will suit Porsche Panamera cooling system. You may use code of motor MCR.CC and volume figure of 3.0 or just tell the 2013 year of production to buy liquid.
Look at Porsche’s requirements and make your 2011 Panamera serve longer and with no problem. Produced in 2012 the 3.0 engine in Panamera model will serve longer by this. A lot of M46.20 motors are used long in Porsche cars but only with good service.