https://www.openflashtablet.com/shop/openflash-tablet-for-mercedes-x63-amg-glk-class-g-class-c-class-e-class-and-more/


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Somehow, this rings a bell from the Fiat Abarth world. My wife has an Abarth.
If this is the same unit, the company that makes the flash tablet uses the word tuning deceptively.
In their acceptance, tuning means you have the freedom to load as many canned tunes (paid individually), as you want to buy.
It could in theory allow you to tune yourself, but that capability was either whittled, or available for more money.
That unit was also called tablet and looked similar. I'm too lazy to go check, to find out for sure ...
Also, this is news from 2 years ago, maybe now they changed, but back then in the Abarth community, this is why people did not line up to buy them.