As the A45 AMG's don't have clutches you would be fine
More seriously, the seat adjustment and the column adjustment both up and own and in and out means it is very easy, even for me at 6' 2", to find a comfy driving position.
I wonder if the clutch is just ridiculously high in the manuals...
I'm 6'1, so not far off, but it was very comfortable and I'm sure if it had the same seats as yours it's be even better. I've loved these since they came out and a neighbour of my parents bought a midrange diesel one with the AMG kit in gun metal and it is a bloody work of art!
Just need to bring out a 3 door version