Please let me know whether there are any differences between the XXL 540 S model and the XXL 540 TM model.\r\n\r\nThe reason I asked because I ordered an XXL 540 TM from Amazon. When I updated the unit tonight (I received it this morning) I think the unit was fully charged, because the light was green (or blue, I forget) when I tried to charge the unit. Is this normal, or the unit was used? I ordered it new and it was marked on the receipt of the order by Amazon as "new".\r\n\r\nOne time after some item was downloaded, it said this item would be installed in the memory card and it did. I thought the XXL 540 TM did not has a memory card. TomTom home downloaded and installed things a few times then said no more updates.\r\n\r\nHowever, after the initial update, I put the promotion (activation) code in. I think because of this TomTom Home checked again and said there are detailed maps seamlessly covering U.S., Canada and Mexico and asked whether I wanted it installed now or later. The size is 1664.3 MB and I only had 17.9 MB left in the unit, so I clicked "later". It also said the detailed map was available on line and all I have to do is go to TomTom home.\r\n\r\nI checked the unit following some instructions in TomTom Home and found that my unit is a LLX 540 S and not LLX 540 TM.\r\n\r\nI don't understand why and don't think Amazon did it intentionally. My only guess is that it is possible that I did not put the activation code of the unit in from the beginning and TomTom Home thought my unit was a LLX 540 S. It also let me update "one time only" before the activation code.\r\n\r\nPlease advise whether Amazon made a mistake and sent me the wrong unit or because of my mistake by not put the activation code in from the beginning. Thank you.