I have a 2016 XF and have been really enjoying it. I’ve been driving in sport mode lately and I’ve noticed when I accelerate the engine makes a discernible fluttering sound. Nothing too loud and the engine and acceleration seem to behaving just fine.

Curious if others notice the same sound… or should I stay to get just a wee bit paranoi? Car comes out of warranty at the end of the month.

Cheers!