When to stop using newborn headrest in recaro car seat?

[Margaritaz]

Maybe the clue is in the question but does anyone know when to stop using the newborn headrest insert in the recaro Young profi plus car seat (or any others?) my lo is 17 weeks & looks cramped in it but I don't want to take it out if not advised. ive checked the instructions on recaro website but can't find any reference
Thank you!

[MissRainbowBrite]

I'm not sure about your model but on our Maxi Cosi Cabriofix which is a similar style seat we took the insert out when DD was about 12 weeks.
I don't think there is any exact guidance, I would just try without and if they seem ok then leave it out.