Early W114/W115 cars did not have the lock option.

I'm a bit fuzzy since it's been a while, but I think my 73 220D had them.
I've never seen a set on a 72 or earlier.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles