what is the drive cycle on 2004 mercury grand marquid

You are going to want to drive about 100 miles but make sure it's getting up to operating temp each time. Your best bet so you don't waste any time is to simply check after 100 miles and see if your readiness monitors have all checking out. Even a cheap $20 scanner can tell you this. Most parts stores offer from code reading so ask if they can hook up and check the readiness monitors. If they all say complete and you don't have current trouble codes you will pass. Alex