Hello everyone, I want to do a Stage 1 tune on my car. It’s a 2016 C300 W205 from USA 118k Km, and additionally my car has the M014 – engine increased performance option.

So my question is: is it safe to do a Stage 1 tune on this engine (/safe setup), and roughly how much horsepower could it make? I know that this engine is normally rated at 245 hp stock, but with the M014 option, is there a chance that the car currently makes more than 245 hp? I’ve seen some sources saying it might be 258 hp — is that possible?