I gave up and bought from Chrysler. No one makes an aftermarket TPMS that can be set by the machine to work on XFs. In addition, Mercedes' machine won't work on XFs. I went the 'disable the idiot light', but I want to sell the car, so I ponied up the cash for the replacements.[/QUOTE]


How would we know how many years these sensors were sitting on the shelf at the dealership? Do the batteries not wane even if not put into service? Do the packages they come in have a "born on" or "To be sold by" date?