Which Mercedes Benz Star Diagnosis to buy?

Which one is to prefer C4 or C6?








The price from AliExpress recently doubled to more than $800 because of the orange-man's tariffs.
@BenzNinja explains it all on his website.
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More cheap and safe is to install native programs ( there is a website here on forum selling with very few $$ Xentry, DTS, Vediamo, etc, for personal use)) that works great with all security enabled.
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