Autogas system for Jag X300

Hello Jaguar municipality, the question is simple and yet not trivial. How reliable are autogas systems in a Jaguar X300 ( 4.0 liters) . Which are recommended, or better to let the fingers of it, because there is only trouble and they lead to engine damage in the long term ? How high should the cost of a serious offer to the LPG conversion be ? Are there recommendations in the Berlin area for this ? If there are good arguments for the switch to car gas, is something special for the Jag to Note ? Thanks Volga-Olga