[aircombat]

top of the script :

pawn Code:

new gClassid[MAX_PLAYERS];

under OnPlayerRequestClass :

pawn Code:

gClassid[playerid] = classid;

then use :

pawn Code:

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
    {
       if(gClassid[playerid] == 106)
       {
            if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 416)
            {
                SetPlayerWantedLevel(playerid,4);
                SendClientMessageToAll(RED,"%s has stolen a police car");
                SetPlayerColor(playerid,RED);
            }
        }
    }
    return 1;
}

P.S : But u better use SetPlayerTeam or gTeam instead of class ids