Dear all Sifu,I am considering getting a E60 525 yr 04. If i am not mistaken, is running on the M54 engine rather than the newer N52. Jus wan to find out the difference between these 2 engines? Any problems with the M54 engine n gearbox? Wat about the maintenance of the M54 engine compare to the N52? Will appreciate all your advice so that i can make up my mind whether to get the yr 04 or the yr 05 with then N52 engineThanks...