just to be the devil's advocate, audi has this problem because it has some very unique engines. mercedes puts models out faster, but they are not as unique. witness for example how C63, E63, CL63, SL63, and S63 have practically the same engine. it would piss me off if i knew my RS6 and R8 had the same engine as the RS4.

further, audi has a more complex RD program. thye have a team that develops the grain, texture, and feel of their buttons and dashboards. this is the difference between a benz and an audi. i have been in close contact with some of the latest benz models and there is still no comparison. we pay the price of this complexity with longer wait times. the RS6 engine is quite a package.... takes awhile to "wrap it" up for delivery.