First, your car uses R-12 and not R-22. Surely this is what you have on hand and simply typed it wrong. (R-22 is for things like residential HVAC units)

The larger diameter hose is the low side and the small hose is the high side.
The fittings are, as you know, the same.

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02 S500
92 500SL
92 400E (Sold)
87 300E (Sold)
83 300D Turbo (Sold)
75 300D (Sold)
74 240D (Sold after 20 years)