[SilentSoul]

You don't need to update the preview model, you just need to update it once, when the player enter the vehicle and hide it when he exit.

pawn Код:

public Brzina()
{
    foreach(Player, i)
    {
        if(IsPlayerInAnyVehicle(i) && GetVehicleModel(GetPlayerVehicleID(i)))
        {
            new Float:HP;
            GetVehicleHealth(GetPlayerVehicleID(i), HP);

            new string[220], v = GetPlayerVehicleID(i);
            format(string, sizeof string, "~w~brzina: ~b~%dkm/h", IgracevaBrzina(i));
            TextDrawSetString(BrzinaTD[2][i], string);

            format(string, sizeof string, "~w~gorivo: ~b~%dl", Gorivo[GetPlayerVehicleID(i)]);
            TextDrawSetString(BrzinaTD[4][i], string);

            if(GetPlayerState(i) == PLAYER_STATE_DRIVER && !VoziloJeBicikla(GetVehicleModel(GetPlayerVehicleID(i))))
            {
                TextDrawShowForPlayer(i, BrzinaTD[0][i]);
                //TextDrawShowForPlayer(i, BrzinaTD[1][i]);
                TextDrawShowForPlayer(i, BrzinaTD[2][i]);
                TextDrawShowForPlayer(i, BrzinaTD[3][i]);
                TextDrawShowForPlayer(i, BrzinaTD[4][i]);
            }
        }
        else
        {
                TextDrawHideForPlayer(i, BrzinaTD[0][i]);
               // TextDrawHideForPlayer(i, BrzinaTD[1][i]);
                TextDrawHideForPlayer(i, BrzinaTD[2][i]);
                    TextDrawHideForPlayer(i, BrzinaTD[3][i]);
                TextDrawHideForPlayer(i, BrzinaTD[4][i]);
        }
    }
    return 1;
}
public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
        TextDrawSetPreviewModel(BrzinaTD[1][playerid], GetVehicleModel(vehicleid));
        TextDrawShowForPlayer(playerid, BrzinaTD[1][playerid]);
    return true;
}
public OnPlayerExitVehicle( playerid ,  vehicleid )
{
        TextDrawHideForPlayer(playerid, BrzinaTD[1][playerid]);
    return true;
}