public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
    {
        if((newkeys & KEY_ACTION))
        {
            new VehicleID = GetPlayerVehicleID(playerid);
            if(GetVehicleModel(VehicleID) == 525) //ID Tow Trucka
            {
                if(IsTrailerAttachedToVehicle(VehicleID))
                {
                    DetachTrailerFromVehicle(VehicleID);
                }
                else
                {
                    new Float:VehPoss[3];
                    for(new x = GetVehiclePoolSize(); x >= 0; x--)
                    {
                        GetVehiclePos(x, VehPoss[0], VehPoss[1], VehPoss[2]);
                        if((IsPlayerInRangeOfPoint(playerid, 6.8, VehPoss[0], VehPoss[1], VehPoss[2])) && (x != VehicleID))
                        {
                            AttachTrailerToVehicle(x, VehicleID);
                            break;
                        }
                    }
                }
            }
        }
    }
    return 1;
}

COMMAND:l(playerid, params[])
{
    if((isnull(params)) || (strlen(params) < 1))
        return SendClientMessage(playerid, -1, "U?yj: /l [tre??]");
    new Float:lPos[3];
    GetPlayerPos(playerid, lPos[0], lPos[1], lPos[2]);
    new lVW = GetPlayerVirtualWorld(playerid), lString[180];
    format(lString, 180, "Local Chat(%s): %s", Player[playerid][Name], params);
    foreach(Player, i)
        if((IsPlayerInRangeOfPoint(i, 30.0, lPos[0], lPos[1], lPos[2])) && (lVW == GetPlayerVirtualWorld(i)))
            SendClientMessage(i, -1, lString);
    return 1;
}