It is not my intentions to say ayone is wrong. The parts are in the same believe it or not even if the part numbers are different. I say this because my company makes parts for several us auto companies, for example off the same die, for the same car one basket has a part number and goes to plant X and another basket goes to plant B with different part numbers. Think, It is not economicaly sound for any company to build a seperate line of tooling to make a limited number of " special any thing" trust me i do automobile tooling for a living. We count part cost down to the 1,000th of a cent. When you think millions of parts a month a penny saved a piece can be the difference between profit or loss. I am sure mercedes is more interested in making money than to make special parts. so with that said the cam, crank, rods, block, oil squirters and likely most everthing else is the same. But however if you don't believe go ahead and give your money away there is likely some who will sell you all the "special" amg/ srt parts you like.