See also: 2015 update Just so we're clear here about which type of train is which, here's a quick guide... Firstly, this is the train that's in the news today: the Siemens. Their brakes have problems. (Update 2012: The brake problems have apparently been fixed.) Whereas this is the Comeng. Their air-conditioners tend to konk out above 35 degrees. (Update 2012: The air-con has been fixed