new
    vEngine[ MAX_VEHICLES ]
;

public OnGameModeInit( )
{
    ManualVehicleEngineAndLights( );

    return 1;
}

public OnVehicleSpawn( vehicleid )
{
    vEngine[ vehicleid ] = 0;

    return 1;
}

COMMAND:engine( playerid, params[ ] )
{
    if ( !IsPlayerInAnyVehicle( playerid ) )
        return SendClientMessage( playerid, -1, "You are not in any vehicle." );

    new vid = GetPlayerVehicleID( playerid ), engine, lights, alarm, doors, bonnet, boot, objective;

    GetVehicleParamsEx(vid, engine, lights, alarm, doors, bonnet, boot, objective);

    switch( vEngine[ vid ] )
    {
        case 0: vEngine[ vid ] = 1, SetVehicleParamsEx( vid, 1, lights, alarm, doors, bonnet, boot, objective ),        SendClientMessage( playerid, -1, "turned on" );
        default: vEngine[ vid ] = 0, SetVehicleParamsEx( vid, 0, lights, alarm, doors, bonnet, boot, objective ),
                   SendClientMessage( playerid, -1, "turned off" );
    }

    return 1;
}