The short answer is, No. The intake is already optimized for the operation limit of your car.
If you get the ECU upgraded then I would pick up a 320 c-class intake, I think it breathes and has larger air filters, so it is a little better than the XF's intake system. And don't waste your money on that Ebay intake crap. That let's hot air into the engine, it's not gonna make more power, just a loud noise of the intake.