I don't think I'm in the wrong forum but thanks for your advice. Even porsche owners discuss fuel economy. There's nothing wrong with having these discussions after all that's what theses forums are for aren't they. looks are a matter of personal preference. I'm sure the IS owners would say the 250 is a better looking car. Lastly I think both engines are great and after driving german for 20+ years I'm gonna see how well the GS treats me.
Congrats. on new car and welcome to the forum. Please accept my apologies i did not mean to be rude. It is simply my personal veiw, that fuel economy is completely irrelevant in this class. But still, £90K diesel S class is selling strong :D
No need to apologise mate. No offence taken :)