Jaguar tell me that the aircon condenser on a 2006 Diesel XJ is not the same as the petrol version whereas Hella which makes Jag equivalent spares says that they are the same. http://seekpart24.com/hella/condenser-air-conditioner-8fc351301591?c=100355#vehicle_pkw Is there anyone who knows the correct answer as the difference between the Jag recommended genuine part and the alternative is about GBP450.- = Ronnie