It is because they all have a VIN starting with WDB124036 (at least with the standard European VIN), and the EPC does not differ between them in general.
Of course other than the usual notifications like "only for cars up to VIN xyz", "only for cars from VIN xyz on" or "SA-code xyz only".
The difference between 500E and E500 can be found in "only for cars up to VIN xyz" which often equals to 500E, and "only for cars from VIN xyz on" which often equals to E500.
Like you know, the AMG package was offered as factory option and seen as a normal SA with SA-code 957 (like for example a leather interior).
But the car was still titled as WDB124036