If every country could agree on a standard then we wouldn't need to convert anything! Despite protests from many, Australia converted to metric weights and measures back in the 1970s. I started by learning with the imperial system and then had to convert to the metric system. Whilst I am still conversant with both, I much prefer the simple maths of the SI (metric) system. For those in the few countries that still uses inches, feet, yards, miles, onces, pounds, tons, gallons and horsepower, I can assure you that millimetres, centimetres, metres, kilometres, grams, kilogrammes, tonnes, litres and watts (and kilowatts) are much easier to work with.
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.