Motor/Licht

hey, warum kommt hier undefined symbol lights / engine
if(newstate == PLAYER_STATE_DRIVER)
{
if(engine == VEHICLE_PARAMS_ON)
{
SendClientMessage(playerid,ORANGE,"An");
}
else
{
SendClientMessage(playerid,ORANGE,"Aus");
}

if(lights == VEHICLE_PARAMS_ON)
{
SendClientMessage(playerid,ORANGE,"An");
}
else
{
SendClientMessage(playerid,ORANGE,"Aus");
}

Kann man das so schreiben?

bringt auch nichts, also die Funktion klappt noch nicht