You were not following the correct steps to reset the FSS display..
You will get the 41___1 code, if you turn your key to position 0 when the mileage meter is showing total mileage instead of the FSS display..
You need to turn your key to position 2, pulse twice fast to obtain the FSS display, turn your key to position 0, and then (while it still shows the FSS display), press and hold the button until the FSS display resets to 10,000 while turning your key position to 2...
Though, when I got that 41___1 display, It felt like something reset in my vehicle.. The transmission learning or something.. It felt different for a while and then it was fine.. It is like if I reset something else.. It may have been my imagination but I wonder what the 41___1 display reset is for...
Drew.. You are an expert in the ML... Do you happen to know what is reset when you get the 41____1 code..?