I was at the book store not to long ago and saw a book on Mercedes cars produced in the last 100 years . When I saw my 560 SEL listed for 300hp in the euro version I wondered what the dramatic differance in parts was to yield that kind of an increase . What parts are different in US form ? If I could find Eurospec parts would I be able to gain 50-60 Hp ? Thanks for all the great advice .