Bilal, there is no doubt that a completely delimited E55 AMG can do 320 kph on the speedo and probably even "true" 320 kph. I don't know why people have doubts because they just need to use their brain for doing some logic thinking:
why does AMG
limit the E55 AMG to 300 kph if it can't run any faster? And when I was doing top speed, the speedo showed 309 kph as far as I remember.
I suppose most people have a little problem with logic thinking.
Regarding the picture: I took lots of speedo shots while the car was moving. Even when the analogue reading of the speedo was a little bit blurry, the digital readout was still visible, blurry but readable. Maybe this isn't a PS job but I'm pretty much positive.