There seems to be considerable differences between your 16.bin and the one usually flashed to the aera 500 devices marketed in US/EU/AU etc. countries.

Those changes are not only limited to the splash screen images.

It probably will not hurt to simply flash the Western logo file to it however it would be quite safe to simply change the current 2 images from the current "MARKUS BESAR ...etc." to "GARMIN" in your 16.bin file and flash it back. Either process is quite straight-forward so just post to say which you'd prefer to do and i'll make the appropriate SD flash kit for you.