Its position 1. And it was a while ago. If the collar doesn't unscrew CCW then you haven't hit the mark. Wiggle the key a little as your sticking it in, you'll feel it when your in the right spot.

The position 1, position 2 stuff is due to some people calling the off, key out position, position 1 instead of 0.

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.