[SilverKiller]

Probably this ?

pawn Код:

if(IsPlayerInRangeOfPoint(playerid, 2.0, 740.5068,-1332.7472,14.1702))

Edit: i got you!

I think you meant that who is near that van can type /healme?

pawn Код:

CMD:healme(playerid, params[])
{
    if(!IsPlayerInRangeOfPoint(playerid, 2.0, 740.5068,-1332.7472,14.1702)) return SendClientMessage(playerid, -1, "Your message");
    else
    {
        SetPlayerHealth(playerid, 100);
    }
    return 1;
}

pawn Код:

if(!strcmp(cmdtext, "/healme", true))
{
    if(!IsPlayerInRangeOfPoint(playerid, 2.0, 740.5068,-1332.7472,14.1702)) return SendClientMessage(playerid, -1, "Your message");
    else
    {
        SetPlayerHealth(playerid, 100);
    }
    return 1;
}