What does the S 1 2 on the door do?

Those are seat memory buttons, one for each person. Check your owner's manual for instructions if you can't figure it out.

seat settings, mirror too . had that on a t&c and i was told it was to remember settings for driver 1 and driver 2........couldnt make it work, tho i didnt try too hard brucea

Oh OK I just ea

Oh I just wanted to know cause all of a sudden my two door on the driver side won't open

I have a 2011 Chrysler town and country that has a bottom on door handle.i was wondering if its a key code?

If you adjust the driver's seat, side-view mirrors, and brake / accelerator to where you want them, then press S then 1 (or S, 2 if you're the second driver), it holds these presets for you. If anyone changes any of these, you can press 1 or 2 and everything will return to your desired places. You cannot change these settings or activate them while driving. Once drive, you must shut off your vehicle with the key out then start everything back up again to activate or set these presets. Hope this helps.