GLC 4matic Premium 3 package

I am interested in the 4matic p3 package but none of the deakers close to me have them in stock. Are these extremely popular or not at all? Any issue with this particular package? I know it adds around $7k MSRP to the base price but I see other configurations that are more expensive with the dealership but not p3.
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Comments
Those configurations probably have designo exterior or designo seats. They can make the vehicle very expensive too.