Answer
The FamilyFix is secured to the bottom of the car body by the two IsoFix anchor points. The left lamp on the indicator panel on the FamilyFix will turn green to confirm that the seat is installed correctly. The strong connection between the two guarantees maximum safety, regardless of any noises you might hear. The Pearl has two sturdy metal spindles on the bottom. The FamilyFix has 4 hooks that are attached to these spindles on the Pearl. Once the 4 hooks are secure around the 2 spindles, the maximum safety of the system is guaranteed. The right lamp on the indicator panel on the FamilyFix will turn green to confirm that the seat is secured correctly. To ensure that the Pearl can always be installed onto the FamilyFix easily in all instances, there must be some space between the spindles and hooks. This space is what causes the slack. This slack does not affect safety in any way whatsoever. The sound that may result from this extra space depends on a number of factors. The shape of the back seat and the installation of the FamilyFix may affect this. You could try to push the FamilyFix more firmly against the back of the car seat. It is also possible in some cars to adjust the back of the car passenger seat. If this is possible, you can adjust the back so that it fits firmly against the Pearl.