Volvo V70/XC70 Rear Door Lock 

Very rare feature - the key lock on the rear/hatch door, was mostly avaliable on 7-seats versions (folded kids seats in the back/trunk area)
Could be installed separately, but the assembly kit is hard to find and quite expensive.
One try finding it at the scrap jard/ junk jard but as it was very rare - chances are poor.
Детали - тут www.drive2.ru/l/5384696029805...