Background 2008 fsi with a lot of miles. 206k lol. Has a strange sound on deceleration. Can't really tell when driving but very apparent with a rev in neutral. Car actually runs decent. Completely stock, this sound is only apparent behind the motor can not be heard from the under the hood. Sound stops after 1500 rpm. Just bought this car for dirt cheap and I mean dirt cheap. Has a mis on cylinder two from coils. I've had plenty of BMWs so I know all about stupid coil misfires haha. Any ideas?