I've posted this in the "Canada" forum as car seats need to be purchased within canada to be legally used.
I did do a search of this topic and noted someone was able to fit a Recaro convertible seat in the back middle console. However, the Recaro's are not cleared by Transport Canada to be used here.
My S5 has been allocated and should arrive in March. My daughter will be 6 months old at that time. I'm trying to plan ahead to keep the S5 wf (wife friendly). Probably would only be using this car occasionally with the whole family, as we have an SUV for that purpose.