Aussie delivered MBs have had child restraint anchorage points since the mid '70s. There is usually one for each rear seat position. In the sedans they are located on the rear parcel shelf with the centre one sometimes under the cover for the first-aid kit (with a hole through the cover). They usually have plastic plugs fitted which need to be removed before screwing in a child restraint anchor (a 5/16" thread from memory). In our 124 wagon there are three anchorages on the load floor area behind the rear seats (floor between 2nd and 3rd row seats) and in our previous 123 wagon there were three on a bar that mounted across the back of the seats.

__________________
107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.